79543091 has 4 divisors (see below), whose sum is σ = 79583712. Its totient is φ = 79502472.

The previous prime is 79543067. The next prime is 79543097. The reversal of 79543091 is 19034597.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19034597 = 491 ⋅38767.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79543091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79543097) 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 in 3 ways as a sum of consecutive naturals, for example, 17216 + ... + 21341.

It is an arithmetic number, because the mean of its divisors is an integer number (19895928).

Almost surely, 2^79543091 is an apocalyptic number.

79543091 is a deficient number, since it is larger than the sum of its proper divisors (40621).

79543091 is a wasteful number, since it uses less digits than its factorization.

79543091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40620.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 79543091 is about 8918.6933460009. The cubic root of 79543091 is about 430.0650541561.

The spelling of 79543091 in words is "seventy-nine million, five hundred forty-three thousand, ninety-one".