79720619 has 8 divisors (see below), whose sum is σ = 87032880. Its totient is φ = 72419200.

The previous prime is 79720583. The next prime is 79720651. The reversal of 79720619 is 91602797.

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 79720619 - 2²⁰ = 78672043 is a prime.

It is a super-2 number, since 2×79720619² = 12710754187486322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79720679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25367 + ... + 28335.

It is an arithmetic number, because the mean of its divisors is an integer number (10879110).

Almost surely, 2^79720619 is an apocalyptic number.

79720619 is a deficient number, since it is larger than the sum of its proper divisors (7312261).

79720619 is a wasteful number, since it uses less digits than its factorization.

79720619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5421.

The product of its (nonzero) digits is 47628, while the sum is 41.

The square root of 79720619 is about 8928.6403780195. The cubic root of 79720619 is about 430.3847628777.

The spelling of 79720619 in words is "seventy-nine million, seven hundred twenty thousand, six hundred nineteen".