79642519 has 8 divisors (see below), whose sum is σ = 87067008. Its totient is φ = 72248760.

The previous prime is 79642483. The next prime is 79642523. The reversal of 79642519 is 91524697.

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 79642519 - 2¹¹ = 79640471 is a prime.

It is a super-2 number, since 2×79642519² = 12685861665330722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79642219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2077 + ... + 12790.

It is an arithmetic number, because the mean of its divisors is an integer number (10883376).

Almost surely, 2^79642519 is an apocalyptic number.

79642519 is a deficient number, since it is larger than the sum of its proper divisors (7424489).

79642519 is a wasteful number, since it uses less digits than its factorization.

79642519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15365.

The product of its digits is 136080, while the sum is 43.

The square root of 79642519 is about 8924.2657401043. The cubic root of 79642519 is about 430.2441717610.

The spelling of 79642519 in words is "seventy-nine million, six hundred forty-two thousand, five hundred nineteen".