10989997 has 4 divisors (see below), whose sum is σ = 11096800. Its totient is φ = 10883196.

The previous prime is 10989991. The next prime is 10990013. The reversal of 10989997 is 79998901.

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: 79998901 = 3529 ⋅22669.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10989997 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 (10989991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53247 + ... + 53452.

It is an arithmetic number, because the mean of its divisors is an integer number (2774200).

Almost surely, 2^10989997 is an apocalyptic number.

It is an amenable number.

10989997 is a deficient number, since it is larger than the sum of its proper divisors (106803).

10989997 is a wasteful number, since it uses less digits than its factorization.

10989997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106802.

The product of its (nonzero) digits is 367416, while the sum is 52.

The square root of 10989997 is about 3315.1164383774. The cubic root of 10989997 is about 222.3305750580.

The spelling of 10989997 in words is "ten million, nine hundred eighty-nine thousand, nine hundred ninety-seven".