78976013 has 2 divisors, whose sum is σ = 78976014. Its totient is φ = 78976012.

The previous prime is 78975983. The next prime is 78976061. The reversal of 78976013 is 31067987.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47582404 + 31393609 = 6898^2 + 5603^2 .

It is a cyclic number.

It is not a de Polignac number, because 78976013 - 2¹⁰ = 78974989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78976613) 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 as a sum of consecutive naturals, namely, 39488006 + 39488007.

It is an arithmetic number, because the mean of its divisors is an integer number (39488007).

Almost surely, 2^78976013 is an apocalyptic number.

It is an amenable number.

78976013 is a deficient number, since it is larger than the sum of its proper divisors (1).

78976013 is an equidigital number, since it uses as much as digits as its factorization.

78976013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 78976013 is about 8886.8449406975. The cubic root of 78976013 is about 429.0406102941.

The spelling of 78976013 in words is "seventy-eight million, nine hundred seventy-six thousand, thirteen".