97768777 has 2 divisors, whose sum is σ = 97768778. Its totient is φ = 97768776.

The previous prime is 97768757. The next prime is 97768807. The reversal of 97768777 is 77786779.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64256256 + 33512521 = 8016^2 + 5789^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97768777 is a prime.

It is not a weakly prime, because it can be changed into another prime (97768747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48884388 + 48884389.

It is an arithmetic number, because the mean of its divisors is an integer number (48884389).

Almost surely, 2^97768777 is an apocalyptic number.

It is an amenable number.

97768777 is a deficient number, since it is larger than the sum of its proper divisors (1).

97768777 is an equidigital number, since it uses as much as digits as its factorization.

97768777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7260624, while the sum is 58.

The square root of 97768777 is about 9887.8095147510. The cubic root of 97768777 is about 460.6807453888.

The spelling of 97768777 in words is "ninety-seven million, seven hundred sixty-eight thousand, seven hundred seventy-seven".