97776031 has 2 divisors, whose sum is σ = 97776032. Its totient is φ = 97776030.

The previous prime is 97776011. The next prime is 97776047. The reversal of 97776031 is 13067779.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 97776031 - 2⁵ = 97775999 is a prime.

It is a super-2 number, since 2×97776031² = 19120304476225922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97776001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48888015 + 48888016.

It is an arithmetic number, because the mean of its divisors is an integer number (48888016).

Almost surely, 2^97776031 is an apocalyptic number.

97776031 is a deficient number, since it is larger than the sum of its proper divisors (1).

97776031 is an equidigital number, since it uses as much as digits as its factorization.

97776031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55566, while the sum is 40.

The square root of 97776031 is about 9888.1763232661. The cubic root of 97776031 is about 460.6921385813.

The spelling of 97776031 in words is "ninety-seven million, seven hundred seventy-six thousand, thirty-one".