78713161 has 2 divisors, whose sum is σ = 78713162. Its totient is φ = 78713160.

The previous prime is 78713147. The next prime is 78713197. The reversal of 78713161 is 16131787.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71503936 + 7209225 = 8456^2 + 2685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78713161 is a prime.

It is a super-2 number, since 2×78713161² = 12391523429223842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78713101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39356580 + 39356581.

It is an arithmetic number, because the mean of its divisors is an integer number (39356581).

Almost surely, 2^78713161 is an apocalyptic number.

It is an amenable number.

78713161 is a deficient number, since it is larger than the sum of its proper divisors (1).

78713161 is an equidigital number, since it uses as much as digits as its factorization.

78713161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056, while the sum is 34.

The square root of 78713161 is about 8872.0437893419. The cubic root of 78713161 is about 428.5640962925.

The spelling of 78713161 in words is "seventy-eight million, seven hundred thirteen thousand, one hundred sixty-one".