79402747 has 2 divisors, whose sum is σ = 79402748. Its totient is φ = 79402746.

The previous prime is 79402723. The next prime is 79402753. The reversal of 79402747 is 74720497.

It is a strong prime.

It is an emirp because it is prime and its reverse (74720497) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79402747 - 2⁷ = 79402619 is a prime.

It is a super-2 number, since 2×79402747² = 12609592462292018, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (79402247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39701373 + 39701374.

It is an arithmetic number, because the mean of its divisors is an integer number (39701374).

Almost surely, 2^79402747 is an apocalyptic number.

79402747 is a deficient number, since it is larger than the sum of its proper divisors (1).

79402747 is an equidigital number, since it uses as much as digits as its factorization.

79402747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 98784, while the sum is 40.

The square root of 79402747 is about 8910.8219037303. The cubic root of 79402747 is about 429.8119729579.

The spelling of 79402747 in words is "seventy-nine million, four hundred two thousand, seven hundred forty-seven".