78433131 has 32 divisors (see below), whose sum is σ = 124174336. Its totient is φ = 43092000.

The previous prime is 78433111. The next prime is 78433181. The reversal of 78433131 is 13133487.

It is not a de Polignac number, because 78433131 - 2⁵ = 78433099 is a prime.

It is a super-2 number, since 2×78433131² = 12303512076926322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78433111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 137076 + ... + 137646.

It is an arithmetic number, because the mean of its divisors is an integer number (3880448).

Almost surely, 2^78433131 is an apocalyptic number.

78433131 is a deficient number, since it is larger than the sum of its proper divisors (45741205).

78433131 is a wasteful number, since it uses less digits than its factorization.

78433131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823.

The product of its digits is 6048, while the sum is 30.

The square root of 78433131 is about 8856.2481333802. The cubic root of 78433131 is about 428.0552724349.

The spelling of 78433131 in words is "seventy-eight million, four hundred thirty-three thousand, one hundred thirty-one".