97499999977 has 2 divisors, whose sum is σ = 97499999978. Its totient is φ = 97499999976.

The previous prime is 97499999951. The next prime is 97500000019. The reversal of 97499999977 is 77999999479.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96855398656 + 644601321 = 311216^2 + 25389^2 .

It is a cyclic number.

It is not a de Polignac number, because 97499999977 - 2²⁷ = 97365782249 is a prime.

It is not a weakly prime, because it can be changed into another prime (97499996977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48749999988 + 48749999989.

It is an arithmetic number, because the mean of its divisors is an integer number (48749999989).

Almost surely, 2^97499999977 is an apocalyptic number.

It is an amenable number.

97499999977 is a deficient number, since it is larger than the sum of its proper divisors (1).

97499999977 is an equidigital number, since it uses as much as digits as its factorization.

97499999977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6562233468, while the sum is 88.

The spelling of 97499999977 in words is "ninety-seven billion, four hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred seventy-seven".