78350931 has 12 divisors (see below), whose sum is σ = 113307480. Its totient is φ = 52172160.

The previous prime is 78350911. The next prime is 78350947. The reversal of 78350931 is 13905387.

It is not a de Polignac number, because 78350931 - 2⁷ = 78350803 is a prime.

It is a super-2 number, since 2×78350931² = 12277736777133522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78350911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3676 + ... + 13046.

It is an arithmetic number, because the mean of its divisors is an integer number (9442290).

Almost surely, 2^78350931 is an apocalyptic number.

78350931 is a deficient number, since it is larger than the sum of its proper divisors (34956549).

78350931 is a wasteful number, since it uses less digits than its factorization.

78350931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10306 (or 10303 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 78350931 is about 8851.6061254441. The cubic root of 78350931 is about 427.9056824079.

The spelling of 78350931 in words is "seventy-eight million, three hundred fifty thousand, nine hundred thirty-one".