97796977 has 2 divisors, whose sum is σ = 97796978. Its totient is φ = 97796976.

The previous prime is 97796939. The next prime is 97796983. The reversal of 97796977 is 77969779.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55338721 + 42458256 = 7439^2 + 6516^2 .

It is an emirp because it is prime and its reverse (77969779) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97796977 - 2¹⁹ = 97272689 is a prime.

It is not a weakly prime, because it can be changed into another prime (97796927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48898488 + 48898489.

It is an arithmetic number, because the mean of its divisors is an integer number (48898489).

Almost surely, 2^97796977 is an apocalyptic number.

It is an amenable number.

97796977 is a deficient number, since it is larger than the sum of its proper divisors (1).

97796977 is an equidigital number, since it uses as much as digits as its factorization.

97796977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10501974, while the sum is 61.

The square root of 97796977 is about 9889.2354102832. The cubic root of 97796977 is about 460.7250333799.

The spelling of 97796977 in words is "ninety-seven million, seven hundred ninety-six thousand, nine hundred seventy-seven".