78902723 has 2 divisors, whose sum is σ = 78902724. Its totient is φ = 78902722.

The previous prime is 78902717. The next prime is 78902731. The reversal of 78902723 is 32720987.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78902723 - 2¹⁸ = 78640579 is a prime.

It is not a weakly prime, because it can be changed into another prime (78902753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39451361 + 39451362.

It is an arithmetic number, because the mean of its divisors is an integer number (39451362).

Almost surely, 2^78902723 is an apocalyptic number.

78902723 is a deficient number, since it is larger than the sum of its proper divisors (1).

78902723 is an equidigital number, since it uses as much as digits as its factorization.

78902723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 78902723 is about 8882.7204729182. The cubic root of 78902723 is about 428.9078521862.

The spelling of 78902723 in words is "seventy-eight million, nine hundred two thousand, seven hundred twenty-three".