78368431 has 2 divisors, whose sum is σ = 78368432. Its totient is φ = 78368430.

The previous prime is 78368413. The next prime is 78368441. The reversal of 78368431 is 13486387.

Together with previous prime (78368413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78368431 - 2⁵ = 78368399 is a prime.

It is a super-2 number, since 2×78368431² = 12283221954803522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78368401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39184215 + 39184216.

It is an arithmetic number, because the mean of its divisors is an integer number (39184216).

Almost surely, 2^78368431 is an apocalyptic number.

78368431 is a deficient number, since it is larger than the sum of its proper divisors (1).

78368431 is an equidigital number, since it uses as much as digits as its factorization.

78368431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 40.

The square root of 78368431 is about 8852.5945914178. The cubic root of 78368431 is about 427.9375381961.

The spelling of 78368431 in words is "seventy-eight million, three hundred sixty-eight thousand, four hundred thirty-one".