65312077 has 2 divisors, whose sum is σ = 65312078. Its totient is φ = 65312076.

The previous prime is 65312053. The next prime is 65312083. The reversal of 65312077 is 77021356.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48246916 + 17065161 = 6946^2 + 4131^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65312077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65312047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32656038 + 32656039.

It is an arithmetic number, because the mean of its divisors is an integer number (32656039).

Almost surely, 2^65312077 is an apocalyptic number.

It is an amenable number.

65312077 is a deficient number, since it is larger than the sum of its proper divisors (1).

65312077 is an equidigital number, since it uses as much as digits as its factorization.

65312077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8820, while the sum is 31.

The square root of 65312077 is about 8081.5887670680. The cubic root of 65312077 is about 402.7150236716.

The spelling of 65312077 in words is "sixty-five million, three hundred twelve thousand, seventy-seven".