628972723 has 2 divisors, whose sum is σ = 628972724. Its totient is φ = 628972722.

The previous prime is 628972711. The next prime is 628972727. The reversal of 628972723 is 327279826.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-628972723 is a prime.

It is not a weakly prime, because it can be changed into another prime (628972727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314486361 + 314486362.

It is an arithmetic number, because the mean of its divisors is an integer number (314486362).

Almost surely, 2^628972723 is an apocalyptic number.

628972723 is a deficient number, since it is larger than the sum of its proper divisors (1).

628972723 is an equidigital number, since it uses as much as digits as its factorization.

628972723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 46.

The square root of 628972723 is about 25079.3285994661. The cubic root of 628972723 is about 856.7956847845.

The spelling of 628972723 in words is "six hundred twenty-eight million, nine hundred seventy-two thousand, seven hundred twenty-three".