970039621 has 2 divisors, whose sum is σ = 970039622. Its totient is φ = 970039620.

The previous prime is 970039583. The next prime is 970039639. The reversal of 970039621 is 126930079.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 640798596 + 329241025 = 25314^2 + 18145^2 .

It is a cyclic number.

It is not a de Polignac number, because 970039621 - 2²³ = 961651013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (970039691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485019810 + 485019811.

It is an arithmetic number, because the mean of its divisors is an integer number (485019811).

Almost surely, 2^970039621 is an apocalyptic number.

It is an amenable number.

970039621 is a deficient number, since it is larger than the sum of its proper divisors (1).

970039621 is an equidigital number, since it uses as much as digits as its factorization.

970039621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 970039621 is about 31145.4590751204. The cubic root of 970039621 is about 989.9117769902.

The spelling of 970039621 in words is "nine hundred seventy million, thirty-nine thousand, six hundred twenty-one".