78748507 has 2 divisors, whose sum is σ = 78748508. Its totient is φ = 78748506.

The previous prime is 78748493. The next prime is 78748529. The reversal of 78748507 is 70584787.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78748507 - 2⁷ = 78748379 is a prime.

It is not a weakly prime, because it can be changed into another prime (78748567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39374253 + 39374254.

It is an arithmetic number, because the mean of its divisors is an integer number (39374254).

Almost surely, 2^78748507 is an apocalyptic number.

78748507 is a deficient number, since it is larger than the sum of its proper divisors (1).

78748507 is an equidigital number, since it uses as much as digits as its factorization.

78748507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 439040, while the sum is 46.

The square root of 78748507 is about 8874.0355532306. The cubic root of 78748507 is about 428.6282353324.

It can be divided in two parts, 787 and 48507, that added together give a palindrome (49294).

The spelling of 78748507 in words is "seventy-eight million, seven hundred forty-eight thousand, five hundred seven".