97928977 has 2 divisors, whose sum is σ = 97928978. Its totient is φ = 97928976.

The previous prime is 97928939. The next prime is 97928981. The reversal of 97928977 is 77982979.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52649536 + 45279441 = 7256^2 + 6729^2 .

It is a cyclic number.

It is not a de Polignac number, because 97928977 - 2¹¹ = 97926929 is a prime.

It is not a weakly prime, because it can be changed into another prime (97928927) 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, 48964488 + 48964489.

It is an arithmetic number, because the mean of its divisors is an integer number (48964489).

Almost surely, 2^97928977 is an apocalyptic number.

It is an amenable number.

97928977 is a deficient number, since it is larger than the sum of its proper divisors (1).

97928977 is an equidigital number, since it uses as much as digits as its factorization.

97928977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4000752, while the sum is 58.

The square root of 97928977 is about 9895.9070832340. The cubic root of 97928977 is about 460.9322257529.

It can be divided in two parts, 9792 and 8977, that added together give a square (18769 = 137²).

The spelling of 97928977 in words is "ninety-seven million, nine hundred twenty-eight thousand, nine hundred seventy-seven".