78651013 has 12 divisors (see below), whose sum is σ = 94740960. Its totient is φ = 63783936.

The previous prime is 78650983. The next prime is 78651017. The reversal of 78651013 is 31015687.

It is not a de Polignac number, because 78651013 - 2⁵ = 78650981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78651017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 101893 + ... + 102661.

It is an arithmetic number, because the mean of its divisors is an integer number (7895080).

Almost surely, 2^78651013 is an apocalyptic number.

It is an amenable number.

78651013 is a deficient number, since it is larger than the sum of its proper divisors (16089947).

78651013 is an frugal number, since it uses more digits than its factorization.

78651013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564 (or 795 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 78651013 is about 8868.5406353018. The cubic root of 78651013 is about 428.4512756243.

The spelling of 78651013 in words is "seventy-eight million, six hundred fifty-one thousand, thirteen".