10211989 has 4 divisors (see below), whose sum is σ = 10541440. Its totient is φ = 9882540.

The previous prime is 10211983. The next prime is 10212011. The reversal of 10211989 is 98911201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98911201 = 23 ⋅4300487.

It is a cyclic number.

It is not a de Polignac number, because 10211989 - 2¹³ = 10203797 is a prime.

It is a super-2 number, since 2×10211989² = 208569438672242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 329419 = 10211989 / (1 + 0 + 2 + 1 + 1 + 9 + 8 + 9).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10211989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10211983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164679 + ... + 164740.

It is an arithmetic number, because the mean of its divisors is an integer number (2635360).

Almost surely, 2^10211989 is an apocalyptic number.

It is an amenable number.

10211989 is a deficient number, since it is larger than the sum of its proper divisors (329451).

10211989 is an equidigital number, since it uses as much as digits as its factorization.

10211989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329450.

The product of its (nonzero) digits is 1296, while the sum is 31.

The square root of 10211989 is about 3195.6202840763. The cubic root of 10211989 is about 216.9552244681.

The spelling of 10211989 in words is "ten million, two hundred eleven thousand, nine hundred eighty-nine".