79555727 has 2 divisors, whose sum is σ = 79555728. Its totient is φ = 79555726.

The previous prime is 79555711. The next prime is 79555741. The reversal of 79555727 is 72755597.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79555727 - 2⁴ = 79555711 is a prime.

It is a super-2 number, since 2×79555727² = 12658227396997058, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79555747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39777863 + 39777864.

It is an arithmetic number, because the mean of its divisors is an integer number (39777864).

Almost surely, 2^79555727 is an apocalyptic number.

79555727 is a deficient number, since it is larger than the sum of its proper divisors (1).

79555727 is an equidigital number, since it uses as much as digits as its factorization.

79555727 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 771750, while the sum is 47.

The square root of 79555727 is about 8919.4017176042. The cubic root of 79555727 is about 430.0878259402.

It can be divided in two parts, 7955 and 5727, that multiplied together give a triangular number (45558285 = T₉₅₄₅).

The spelling of 79555727 in words is "seventy-nine million, five hundred fifty-five thousand, seven hundred twenty-seven".