79975619 has 4 divisors (see below), whose sum is σ = 80319096. Its totient is φ = 79632144.

The previous prime is 79975603. The next prime is 79975673. The reversal of 79975619 is 91657997.

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

It is a cyclic number.

It is not a de Polignac number, because 79975619 - 2⁴ = 79975603 is a prime.

It is a super-2 number, since 2×79975619² = 12792199268866322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79975699) 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 3 ways as a sum of consecutive naturals, for example, 171389 + ... + 171854.

It is an arithmetic number, because the mean of its divisors is an integer number (20079774).

Almost surely, 2^79975619 is an apocalyptic number.

79975619 is a deficient number, since it is larger than the sum of its proper divisors (343477).

79975619 is a wasteful number, since it uses less digits than its factorization.

79975619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343476.

The product of its digits is 1071630, while the sum is 53.

The square root of 79975619 is about 8942.9088668061. The cubic root of 79975619 is about 430.8431608320.

The spelling of 79975619 in words is "seventy-nine million, nine hundred seventy-five thousand, six hundred nineteen".