79401831 has 4 divisors (see below), whose sum is σ = 105869112. Its totient is φ = 52934552.

The previous prime is 79401827. The next prime is 79401859. The reversal of 79401831 is 13810497.

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 79401831 - 2² = 79401827 is a prime.

It is a super-2 number, since 2×79401831² = 12609301532305122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 79401792 and 79401801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79401821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13233636 + ... + 13233641.

It is an arithmetic number, because the mean of its divisors is an integer number (26467278).

Almost surely, 2^79401831 is an apocalyptic number.

79401831 is a deficient number, since it is larger than the sum of its proper divisors (26467281).

79401831 is a wasteful number, since it uses less digits than its factorization.

79401831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26467280.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 79401831 is about 8910.7705054052. The cubic root of 79401831 is about 429.8103201634.

The spelling of 79401831 in words is "seventy-nine million, four hundred one thousand, eight hundred thirty-one".