79315805 has 8 divisors (see below), whose sum is σ = 96121944. Its totient is φ = 62824000.

The previous prime is 79315793. The next prime is 79315811. The reversal of 79315805 is 50851397.

It can be written as a sum of positive squares in 4 ways, for example, as 38278969 + 41036836 = 6187^2 + 6406^2 .

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

It is not a de Polignac number, because 79315805 - 2¹² = 79311709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78026 + ... + 79035.

It is an arithmetic number, because the mean of its divisors is an integer number (12015243).

Almost surely, 2^79315805 is an apocalyptic number.

It is an amenable number.

79315805 is a deficient number, since it is larger than the sum of its proper divisors (16806139).

79315805 is a wasteful number, since it uses less digits than its factorization.

79315805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157167.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 79315805 is about 8905.9421174854. The cubic root of 79315805 is about 429.6550415283.

The spelling of 79315805 in words is "seventy-nine million, three hundred fifteen thousand, eight hundred five".