79881419 has 8 divisors (see below), whose sum is σ = 84667968. Its totient is φ = 75104640.

The previous prime is 79881379. The next prime is 79881421. The reversal of 79881419 is 91418897.

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

It is not a de Polignac number, because 79881419 - 2⁸ = 79881163 is a prime.

It is a super-2 number, since 2×79881419² = 12762082202907122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79881019) by changing a digit.

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, 20789 + ... + 24329.

It is an arithmetic number, because the mean of its divisors is an integer number (10583496).

Almost surely, 2^79881419 is an apocalyptic number.

79881419 is a deficient number, since it is larger than the sum of its proper divisors (4786549).

79881419 is a wasteful number, since it uses less digits than its factorization.

79881419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4885.

The product of its digits is 145152, while the sum is 47.

The square root of 79881419 is about 8937.6405723211. The cubic root of 79881419 is about 430.6739368805.

The spelling of 79881419 in words is "seventy-nine million, eight hundred eighty-one thousand, four hundred nineteen".