971025641 has 2 divisors, whose sum is σ = 971025642. Its totient is φ = 971025640.

The previous prime is 971025637. The next prime is 971025683. The reversal of 971025641 is 146520179.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 808208041 + 162817600 = 28429^2 + 12760^2 .

It is a cyclic number.

It is not a de Polignac number, because 971025641 - 2² = 971025637 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

971025641 is a modest number, since divided by 25641 gives 971 as remainder.

It is a Curzon number.

It is equal to p_49448510 and since 971025641 and 49448510 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (971025631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485512820 + 485512821.

It is an arithmetic number, because the mean of its divisors is an integer number (485512821).

Almost surely, 2^971025641 is an apocalyptic number.

It is an amenable number.

971025641 is a deficient number, since it is larger than the sum of its proper divisors (1).

971025641 is an equidigital number, since it uses as much as digits as its factorization.

971025641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 971025641 is about 31161.2843284740. The cubic root of 971025641 is about 990.2470699199.

The spelling of 971025641 in words is "nine hundred seventy-one million, twenty-five thousand, six hundred forty-one".