97163977 has 2 divisors, whose sum is σ = 97163978. Its totient is φ = 97163976.

The previous prime is 97163953. The next prime is 97163981. The reversal of 97163977 is 77936179.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94167616 + 2996361 = 9704^2 + 1731^2 .

It is a cyclic number.

It is not a de Polignac number, because 97163977 - 2²³ = 88775369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 97163977.

It is not a weakly prime, because it can be changed into another prime (97163947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48581988 + 48581989.

It is an arithmetic number, because the mean of its divisors is an integer number (48581989).

Almost surely, 2^97163977 is an apocalyptic number.

It is an amenable number.

97163977 is a deficient number, since it is larger than the sum of its proper divisors (1).

97163977 is an equidigital number, since it uses as much as digits as its factorization.

97163977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 500094, while the sum is 49.

The square root of 97163977 is about 9857.1789574908. The cubic root of 97163977 is about 459.7288524905.

The spelling of 97163977 in words is "ninety-seven million, one hundred sixty-three thousand, nine hundred seventy-seven".