78768907 has 4 divisors (see below), whose sum is σ = 90021616. Its totient is φ = 67516200.

The previous prime is 78768887. The next prime is 78768917. The reversal of 78768907 is 70986787.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78768907 - 2⁷ = 78768779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78768917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5626344 + ... + 5626357.

It is an arithmetic number, because the mean of its divisors is an integer number (22505404).

Almost surely, 2^78768907 is an apocalyptic number.

78768907 is a deficient number, since it is larger than the sum of its proper divisors (11252709).

78768907 is a wasteful number, since it uses less digits than its factorization.

78768907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11252708.

The product of its (nonzero) digits is 1185408, while the sum is 52.

The square root of 78768907 is about 8875.1848994824. The cubic root of 78768907 is about 428.6652445465.

The spelling of 78768907 in words is "seventy-eight million, seven hundred sixty-eight thousand, nine hundred seven".