969967921 has 4 divisors (see below), whose sum is σ = 1044580852. Its totient is φ = 895354992.

The previous prime is 969967919. The next prime is 969967939. The reversal of 969967921 is 129769969.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 176757025 + 793210896 = 13295^2 + 28164^2 .

It is a cyclic number.

It is not a de Polignac number, because 969967921 - 2¹ = 969967919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (969967121) 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, 37306446 + ... + 37306471.

It is an arithmetic number, because the mean of its divisors is an integer number (261145213).

Almost surely, 2^969967921 is an apocalyptic number.

It is an amenable number.

969967921 is a deficient number, since it is larger than the sum of its proper divisors (74612931).

969967921 is a wasteful number, since it uses less digits than its factorization.

969967921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74612930.

The product of its digits is 3306744, while the sum is 58.

The square root of 969967921 is about 31144.3080032291. The cubic root of 969967921 is about 989.8873867757.

The spelling of 969967921 in words is "nine hundred sixty-nine million, nine hundred sixty-seven thousand, nine hundred twenty-one".