79729451 has 2 divisors, whose sum is σ = 79729452. Its totient is φ = 79729450.

The previous prime is 79729423. The next prime is 79729459. The reversal of 79729451 is 15492797.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79729451 - 2⁶ = 79729387 is a prime.

It is a super-2 number, since 2×79729451² = 12713570713522802, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (79729459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39864725 + 39864726.

It is an arithmetic number, because the mean of its divisors is an integer number (39864726).

Almost surely, 2^79729451 is an apocalyptic number.

79729451 is a deficient number, since it is larger than the sum of its proper divisors (1).

79729451 is an equidigital number, since it uses as much as digits as its factorization.

79729451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 158760, while the sum is 44.

The square root of 79729451 is about 8929.1349525024. The cubic root of 79729451 is about 430.4006559549.

The spelling of 79729451 in words is "seventy-nine million, seven hundred twenty-nine thousand, four hundred fifty-one".