78467631 has 16 divisors (see below), whose sum is σ = 120849408. Its totient is φ = 44758400.

The previous prime is 78467629. The next prime is 78467657. The reversal of 78467631 is 13676487.

It is a cyclic number.

It is not a de Polignac number, because 78467631 - 2¹ = 78467629 is a prime.

It is a super-2 number, since 2×78467631² = 12314338229504322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78467681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69375 + ... + 70496.

It is an arithmetic number, because the mean of its divisors is an integer number (7553088).

Almost surely, 2^78467631 is an apocalyptic number.

78467631 is a deficient number, since it is larger than the sum of its proper divisors (42381777).

78467631 is a wasteful number, since it uses less digits than its factorization.

78467631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139902.

The product of its digits is 169344, while the sum is 42.

The square root of 78467631 is about 8858.1956966416. The cubic root of 78467631 is about 428.1180254320.

The spelling of 78467631 in words is "seventy-eight million, four hundred sixty-seven thousand, six hundred thirty-one".