969635021 has 2 divisors, whose sum is σ = 969635022. Its totient is φ = 969635020.

The previous prime is 969635011. The next prime is 969635027. The reversal of 969635021 is 120536969.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 693742921 + 275892100 = 26339^2 + 16610^2 .

It is a cyclic number.

It is not a de Polignac number, because 969635021 - 2¹⁰ = 969633997 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 969635021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (969635027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 484817510 + 484817511.

It is an arithmetic number, because the mean of its divisors is an integer number (484817511).

Almost surely, 2^969635021 is an apocalyptic number.

It is an amenable number.

969635021 is a deficient number, since it is larger than the sum of its proper divisors (1).

969635021 is an equidigital number, since it uses as much as digits as its factorization.

969635021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 41.

The square root of 969635021 is about 31138.9630687985. The cubic root of 969635021 is about 989.7741283162.

The spelling of 969635021 in words is "nine hundred sixty-nine million, six hundred thirty-five thousand, twenty-one".