79409643 has 8 divisors (see below), whose sum is σ = 106342800. Its totient is φ = 52708128.

The previous prime is 79409621. The next prime is 79409647. The reversal of 79409643 is 34690497.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 79409643 - 2²¹ = 77312491 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79409595 and 79409604.

It is not an unprimeable number, because it can be changed into a prime (79409647) 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 7 ways as a sum of consecutive naturals, for example, 57108 + ... + 58481.

It is an arithmetic number, because the mean of its divisors is an integer number (13292850).

Almost surely, 2^79409643 is an apocalyptic number.

79409643 is a deficient number, since it is larger than the sum of its proper divisors (26933157).

79409643 is a wasteful number, since it uses less digits than its factorization.

79409643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115821.

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 79409643 is about 8911.2088405558. The cubic root of 79409643 is about 429.8244154224.

The spelling of 79409643 in words is "seventy-nine million, four hundred nine thousand, six hundred forty-three".