78274631 has 4 divisors (see below), whose sum is σ = 78599664. Its totient is φ = 77949600.

The previous prime is 78274627. The next prime is 78274633. The reversal of 78274631 is 13647287.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13647287 = 389 ⋅35083.

It is a cyclic number.

It is not a de Polignac number, because 78274631 - 2² = 78274627 is a prime.

It is a super-2 number, since 2×78274631² = 12253835716372322, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78274633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162155 + ... + 162636.

It is an arithmetic number, because the mean of its divisors is an integer number (19649916).

Almost surely, 2^78274631 is an apocalyptic number.

78274631 is a deficient number, since it is larger than the sum of its proper divisors (325033).

78274631 is a wasteful number, since it uses less digits than its factorization.

78274631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325032.

The product of its digits is 56448, while the sum is 38.

The square root of 78274631 is about 8847.2951233696. The cubic root of 78274631 is about 427.7667357182.

The spelling of 78274631 in words is "seventy-eight million, two hundred seventy-four thousand, six hundred thirty-one".