971025637 has 2 divisors, whose sum is σ = 971025638. Its totient is φ = 971025636.

The previous prime is 971025631. The next prime is 971025641. The reversal of 971025637 is 736520179.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 899640036 + 71385601 = 29994^2 + 8449^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-971025637 is a prime.

It is a super-2 number, since 2×971025637² = 1885781575422511538, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 971025637.

It is a congruent number.

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, 485512818 + 485512819.

It is an arithmetic number, because the mean of its divisors is an integer number (485512819).

Almost surely, 2^971025637 is an apocalyptic number.

It is an amenable number.

971025637 is a deficient number, since it is larger than the sum of its proper divisors (1).

971025637 is an equidigital number, since it uses as much as digits as its factorization.

971025637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 79380, while the sum is 40.

The square root of 971025637 is about 31161.2842642918. The cubic root of 971025637 is about 990.2470685602.

The spelling of 971025637 in words is "nine hundred seventy-one million, twenty-five thousand, six hundred thirty-seven".