79405379 has 4 divisors (see below), whose sum is σ = 79423584. Its totient is φ = 79387176.

The previous prime is 79405373. The next prime is 79405387. The reversal of 79405379 is 97350497.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79405379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79405373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1769 + ... + 12725.

It is an arithmetic number, because the mean of its divisors is an integer number (19855896).

Almost surely, 2^79405379 is an apocalyptic number.

79405379 is a deficient number, since it is larger than the sum of its proper divisors (18205).

79405379 is a wasteful number, since it uses less digits than its factorization.

79405379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18204.

The product of its (nonzero) digits is 238140, while the sum is 44.

The square root of 79405379 is about 8910.9695880976. The cubic root of 79405379 is about 429.8167219650.

The spelling of 79405379 in words is "seventy-nine million, four hundred five thousand, three hundred seventy-nine".