969159021 has 16 divisors (see below), whose sum is σ = 1304875008. Its totient is φ = 639806000.

The previous prime is 969158999. The next prime is 969159041. The reversal of 969159021 is 120951969.

It is a happy number.

969159021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 969159021 - 2⁵ = 969158989 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (969159041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126346 + ... + 133796.

It is an arithmetic number, because the mean of its divisors is an integer number (81554688).

Almost surely, 2^969159021 is an apocalyptic number.

It is an amenable number.

969159021 is a deficient number, since it is larger than the sum of its proper divisors (335715987).

969159021 is a wasteful number, since it uses less digits than its factorization.

969159021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7872.

The product of its (nonzero) digits is 43740, while the sum is 42.

The square root of 969159021 is about 31131.3189730214. The cubic root of 969159021 is about 989.6121396676.

The spelling of 969159021 in words is "nine hundred sixty-nine million, one hundred fifty-nine thousand, twenty-one".