10791989 has 4 divisors (see below), whose sum is σ = 11622156. Its totient is φ = 9961824.

The previous prime is 10791983. The next prime is 10791997. The reversal of 10791989 is 98919701.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98919701 = 1487 ⋅66523.

It can be written as a sum of positive squares in 2 ways, for example, as 4202500 + 6589489 = 2050^2 + 2567^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10791989 is a prime.

It is a super-2 number, since 2×10791989² = 232934053152242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10791983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 415064 + ... + 415089.

It is an arithmetic number, because the mean of its divisors is an integer number (2905539).

Almost surely, 2^10791989 is an apocalyptic number.

It is an amenable number.

10791989 is a deficient number, since it is larger than the sum of its proper divisors (830167).

10791989 is an equidigital number, since it uses as much as digits as its factorization.

10791989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830166.

The product of its (nonzero) digits is 40824, while the sum is 44.

The square root of 10791989 is about 3285.1162840910. The cubic root of 10791989 is about 220.9872231101.

The spelling of 10791989 in words is "ten million, seven hundred ninety-one thousand, nine hundred eighty-nine".