969745021 has 16 divisors (see below), whose sum is σ = 1158488064. Its totient is φ = 793680624.

The previous prime is 969745013. The next prime is 969745027. The reversal of 969745021 is 120547969.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 969745021 - 2³ = 969745013 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 (969745027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92766 + ... + 102688.

It is an arithmetic number, because the mean of its divisors is an integer number (72405504).

Almost surely, 2^969745021 is an apocalyptic number.

It is an amenable number.

969745021 is a deficient number, since it is larger than the sum of its proper divisors (188743043).

969745021 is a wasteful number, since it uses less digits than its factorization.

969745021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10560.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 969745021 is about 31140.7292946071. The cubic root of 969745021 is about 989.8115551262.

The spelling of 969745021 in words is "nine hundred sixty-nine million, seven hundred forty-five thousand, twenty-one".