78613723 has 2 divisors, whose sum is σ = 78613724. Its totient is φ = 78613722.

The previous prime is 78613679. The next prime is 78613739. The reversal of 78613723 is 32731687.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78613723 - 2²⁵ = 45059291 is a prime.

It is not a weakly prime, because it can be changed into another prime (78610723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39306861 + 39306862.

It is an arithmetic number, because the mean of its divisors is an integer number (39306862).

Almost surely, 2^78613723 is an apocalyptic number.

78613723 is a deficient number, since it is larger than the sum of its proper divisors (1).

78613723 is an equidigital number, since it uses as much as digits as its factorization.

78613723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 37.

The square root of 78613723 is about 8866.4380108361. The cubic root of 78613723 is about 428.3835525138.

The spelling of 78613723 in words is "seventy-eight million, six hundred thirteen thousand, seven hundred twenty-three".