78790507 has 2 divisors, whose sum is σ = 78790508. Its totient is φ = 78790506.

The previous prime is 78790483. The next prime is 78790519. The reversal of 78790507 is 70509787.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78790507 - 2⁷ = 78790379 is a prime.

It is not a weakly prime, because it can be changed into another prime (78791507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39395253 + 39395254.

It is an arithmetic number, because the mean of its divisors is an integer number (39395254).

Almost surely, 2^78790507 is an apocalyptic number.

78790507 is a deficient number, since it is larger than the sum of its proper divisors (1).

78790507 is an equidigital number, since it uses as much as digits as its factorization.

78790507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 123480, while the sum is 43.

The square root of 78790507 is about 8876.4016921273. The cubic root of 78790507 is about 428.7044238090.

It can be divided in two parts, 78790 and 507, that added together give a palindrome (79297).

The spelling of 78790507 in words is "seventy-eight million, seven hundred ninety thousand, five hundred seven".