78625307 has 4 divisors (see below), whose sum is σ = 79702440. Its totient is φ = 77548176.

The previous prime is 78625243. The next prime is 78625321. The reversal of 78625307 is 70352687.

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 78625307 - 2⁶ = 78625243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78625367) 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, 538457 + ... + 538602.

It is an arithmetic number, because the mean of its divisors is an integer number (19925610).

Almost surely, 2^78625307 is an apocalyptic number.

78625307 is a deficient number, since it is larger than the sum of its proper divisors (1077133).

78625307 is a wasteful number, since it uses less digits than its factorization.

78625307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077132.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 78625307 is about 8867.0912367021. The cubic root of 78625307 is about 428.4045927392.

The spelling of 78625307 in words is "seventy-eight million, six hundred twenty-five thousand, three hundred seven".