97677691 has 2 divisors, whose sum is σ = 97677692. Its totient is φ = 97677690.

The previous prime is 97677677. The next prime is 97677709. The reversal of 97677691 is 19677679.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97677691 - 2²¹ = 95580539 is a prime.

It is not a weakly prime, because it can be changed into another prime (97477691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48838845 + 48838846.

It is an arithmetic number, because the mean of its divisors is an integer number (48838846).

Almost surely, 2^97677691 is an apocalyptic number.

97677691 is a deficient number, since it is larger than the sum of its proper divisors (1).

97677691 is an equidigital number, since it uses as much as digits as its factorization.

97677691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1000188, while the sum is 52.

The square root of 97677691 is about 9883.2024668121. The cubic root of 97677691 is about 460.5376369734.

The spelling of 97677691 in words is "ninety-seven million, six hundred seventy-seven thousand, six hundred ninety-one".