79481858 has 4 divisors (see below), whose sum is σ = 119222790. Its totient is φ = 39740928.

The previous prime is 79481777. The next prime is 79481869. The reversal of 79481858 is 85818497.

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

It can be written as a sum of positive squares in only one way, i.e., 66471409 + 13010449 = 8153^2 + 3607^2 .

It is a super-2 number, since 2×79481858² = 12634731502264328, which contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 19870463 + ... + 19870466.

Almost surely, 2^79481858 is an apocalyptic number.

79481858 is a deficient number, since it is larger than the sum of its proper divisors (39740932).

79481858 is a wasteful number, since it uses less digits than its factorization.

79481858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39740931.

The product of its digits is 645120, while the sum is 50.

The square root of 79481858 is about 8915.2598391746. The cubic root of 79481858 is about 429.9546698204.

The spelling of 79481858 in words is "seventy-nine million, four hundred eighty-one thousand, eight hundred fifty-eight".