7897222631 has 2 divisors, whose sum is σ = 7897222632. Its totient is φ = 7897222630.

The previous prime is 7897222603. The next prime is 7897222637. The reversal of 7897222631 is 1362227987.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7897222631 is a prime.

It is a super-2 number, since 2×7897222631² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7897222637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3948611315 + 3948611316.

It is an arithmetic number, because the mean of its divisors is an integer number (3948611316).

Almost surely, 2^7897222631 is an apocalyptic number.

7897222631 is a deficient number, since it is larger than the sum of its proper divisors (1).

7897222631 is an equidigital number, since it uses as much as digits as its factorization.

7897222631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 47.

The square root of 7897222631 is about 88866.3188784142. The cubic root of 7897222631 is about 1991.3982774713.

The spelling of 7897222631 in words is "seven billion, eight hundred ninety-seven million, two hundred twenty-two thousand, six hundred thirty-one".