79231381 has 8 divisors (see below), whose sum is σ = 81939200. Its totient is φ = 76533120.

The previous prime is 79231367. The next prime is 79231403. The reversal of 79231381 is 18313297.

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 79231381 - 2⁹ = 79230869 is a prime.

It is a super-2 number, since 2×79231381² = 12555223470334322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79231081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17125 + ... + 21253.

It is an arithmetic number, because the mean of its divisors is an integer number (10242400).

Almost surely, 2^79231381 is an apocalyptic number.

It is an amenable number.

79231381 is a deficient number, since it is larger than the sum of its proper divisors (2707819).

79231381 is a wasteful number, since it uses less digits than its factorization.

79231381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4779.

The product of its digits is 9072, while the sum is 34.

The square root of 79231381 is about 8901.2010987282. The cubic root of 79231381 is about 429.5025453366.

The spelling of 79231381 in words is "seventy-nine million, two hundred thirty-one thousand, three hundred eighty-one".