97790706631 has 2 divisors, whose sum is σ = 97790706632. Its totient is φ = 97790706630.

The previous prime is 97790706623. The next prime is 97790706649. The reversal of 97790706631 is 13660709779.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97790706631 - 2³ = 97790706623 is a prime.

It is a super-2 number, since 2×97790706631² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97790706691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48895353315 + 48895353316.

It is an arithmetic number, because the mean of its divisors is an integer number (48895353316).

Almost surely, 2^97790706631 is an apocalyptic number.

97790706631 is a deficient number, since it is larger than the sum of its proper divisors (1).

97790706631 is an equidigital number, since it uses as much as digits as its factorization.

97790706631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3000564, while the sum is 55.

The spelling of 97790706631 in words is "ninety-seven billion, seven hundred ninety million, seven hundred six thousand, six hundred thirty-one".