77963497 has 2 divisors, whose sum is σ = 77963498. Its totient is φ = 77963496.

The previous prime is 77963461. The next prime is 77963539. The reversal of 77963497 is 79436977.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43811161 + 34152336 = 6619^2 + 5844^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77963497 is a prime.

It is not a weakly prime, because it can be changed into another prime (77963407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38981748 + 38981749.

It is an arithmetic number, because the mean of its divisors is an integer number (38981749).

Almost surely, 2^77963497 is an apocalyptic number.

It is an amenable number.

77963497 is a deficient number, since it is larger than the sum of its proper divisors (1).

77963497 is an equidigital number, since it uses as much as digits as its factorization.

77963497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2000376, while the sum is 52.

The square root of 77963497 is about 8829.6940490597. The cubic root of 77963497 is about 427.1992061202.

The spelling of 77963497 in words is "seventy-seven million, nine hundred sixty-three thousand, four hundred ninety-seven".