78468131 has 4 divisors (see below), whose sum is σ = 89677872. Its totient is φ = 67258392.

The previous prime is 78468127. The next prime is 78468139. The reversal of 78468131 is 13186487.

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 78468131 - 2² = 78468127 is a prime.

It is a super-2 number, since 2×78468131² = 12314495165266322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78468139) 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, 5604860 + ... + 5604873.

It is an arithmetic number, because the mean of its divisors is an integer number (22419468).

Almost surely, 2^78468131 is an apocalyptic number.

78468131 is a deficient number, since it is larger than the sum of its proper divisors (11209741).

78468131 is a wasteful number, since it uses less digits than its factorization.

78468131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11209740.

The product of its digits is 32256, while the sum is 38.

The square root of 78468131 is about 8858.2239190483. The cubic root of 78468131 is about 428.1189347605.

The spelling of 78468131 in words is "seventy-eight million, four hundred sixty-eight thousand, one hundred thirty-one".