78256267 has 2 divisors, whose sum is σ = 78256268. Its totient is φ = 78256266.

The previous prime is 78256247. The next prime is 78256273. The reversal of 78256267 is 76265287.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78256267 - 2¹¹ = 78254219 is a prime.

It is a super-2 number, since 2×78256267² = 12248086649550578, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78256247) 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 as a sum of consecutive naturals, namely, 39128133 + 39128134.

It is an arithmetic number, because the mean of its divisors is an integer number (39128134).

Almost surely, 2^78256267 is an apocalyptic number.

78256267 is a deficient number, since it is larger than the sum of its proper divisors (1).

78256267 is an equidigital number, since it uses as much as digits as its factorization.

78256267 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 282240, while the sum is 43.

The square root of 78256267 is about 8846.2572311684. The cubic root of 78256267 is about 427.7332803375.

The spelling of 78256267 in words is "seventy-eight million, two hundred fifty-six thousand, two hundred sixty-seven".