10215989 has 4 divisors (see below), whose sum is σ = 11675424. Its totient is φ = 8756556.

The previous prime is 10215971. The next prime is 10216013. The reversal of 10215989 is 98951201.

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.

It is a cyclic number.

It is not a de Polignac number, because 10215989 - 2¹⁶ = 10150453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10215389) 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, 729707 + ... + 729720.

It is an arithmetic number, because the mean of its divisors is an integer number (2918856).

Almost surely, 2^10215989 is an apocalyptic number.

It is an amenable number.

10215989 is a deficient number, since it is larger than the sum of its proper divisors (1459435).

10215989 is an equidigital number, since it uses as much as digits as its factorization.

10215989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459434.

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 10215989 is about 3196.2460793875. The cubic root of 10215989 is about 216.9835476353.

The spelling of 10215989 in words is "ten million, two hundred fifteen thousand, nine hundred eighty-nine".