78715267 has 2 divisors, whose sum is σ = 78715268. Its totient is φ = 78715266.

The previous prime is 78715213. The next prime is 78715277. The reversal of 78715267 is 76251787.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78715267 is a prime.

It is not a weakly prime, because it can be changed into another prime (78715207) 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, 39357633 + 39357634.

It is an arithmetic number, because the mean of its divisors is an integer number (39357634).

Almost surely, 2^78715267 is an apocalyptic number.

78715267 is a deficient number, since it is larger than the sum of its proper divisors (1).

78715267 is an equidigital number, since it uses as much as digits as its factorization.

78715267 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 164640, while the sum is 43.

The square root of 78715267 is about 8872.1624759694. The cubic root of 78715267 is about 428.5679183892.

The spelling of 78715267 in words is "seventy-eight million, seven hundred fifteen thousand, two hundred sixty-seven".