79147457 has 2 divisors, whose sum is σ = 79147458. Its totient is φ = 79147456.

The previous prime is 79147429. The next prime is 79147489. The reversal of 79147457 is 75474197.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72573361 + 6574096 = 8519^2 + 2564^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79147457 is a prime.

It is not a weakly prime, because it can be changed into another prime (79147357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39573728 + 39573729.

It is an arithmetic number, because the mean of its divisors is an integer number (39573729).

Almost surely, 2^79147457 is an apocalyptic number.

It is an amenable number.

79147457 is a deficient number, since it is larger than the sum of its proper divisors (1).

79147457 is an equidigital number, since it uses as much as digits as its factorization.

79147457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 246960, while the sum is 44.

The square root of 79147457 is about 8896.4856544593. The cubic root of 79147457 is about 429.3508448973.

The spelling of 79147457 in words is "seventy-nine million, one hundred forty-seven thousand, four hundred fifty-seven".