78496013 has 2 divisors, whose sum is σ = 78496014. Its totient is φ = 78496012.

The previous prime is 78495997. The next prime is 78496043. The reversal of 78496013 is 31069487.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61669609 + 16826404 = 7853^2 + 4102^2 .

It is a cyclic number.

It is not a de Polignac number, because 78496013 - 2⁴ = 78495997 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_4586708 and since 78496013 and 4586708 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78496043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39248006 + 39248007.

It is an arithmetic number, because the mean of its divisors is an integer number (39248007).

Almost surely, 2^78496013 is an apocalyptic number.

It is an amenable number.

78496013 is a deficient number, since it is larger than the sum of its proper divisors (1).

78496013 is an equidigital number, since it uses as much as digits as its factorization.

78496013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 78496013 is about 8859.7975710509. The cubic root of 78496013 is about 428.1696364422.

The spelling of 78496013 in words is "seventy-eight million, four hundred ninety-six thousand, thirteen".