78911313 has 32 divisors (see below), whose sum is σ = 120489600. Its totient is φ = 45536256.

The previous prime is 78911303. The next prime is 78911333. The reversal of 78911313 is 31311987.

It is not a de Polignac number, because 78911313 - 2⁶ = 78911249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78911303) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80281 + ... + 81257.

It is an arithmetic number, because the mean of its divisors is an integer number (3765300).

Almost surely, 2^78911313 is an apocalyptic number.

It is an amenable number.

78911313 is a deficient number, since it is larger than the sum of its proper divisors (41578287).

78911313 is a wasteful number, since it uses less digits than its factorization.

78911313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121.

The product of its digits is 4536, while the sum is 33.

The square root of 78911313 is about 8883.2039827981. The cubic root of 78911313 is about 428.9234164346.

The spelling of 78911313 in words is "seventy-eight million, nine hundred eleven thousand, three hundred thirteen".