79772215 has 8 divisors (see below), whose sum is σ = 95855760. Its totient is φ = 63731712.

The previous prime is 79772197. The next prime is 79772227. The reversal of 79772215 is 51227797.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 79772215 - 2⁷ = 79772087 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6529 + ... + 14218.

It is an arithmetic number, because the mean of its divisors is an integer number (11981970).

Almost surely, 2^79772215 is an apocalyptic number.

79772215 is a deficient number, since it is larger than the sum of its proper divisors (16083545).

79772215 is a wasteful number, since it uses less digits than its factorization.

79772215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21521.

The product of its digits is 61740, while the sum is 40.

The square root of 79772215 is about 8931.5292643533. The cubic root of 79772215 is about 430.4775926606.

The spelling of 79772215 in words is "seventy-nine million, seven hundred seventy-two thousand, two hundred fifteen".