628750319 has 2 divisors, whose sum is σ = 628750320. Its totient is φ = 628750318.

The previous prime is 628750273. The next prime is 628750393. The reversal of 628750319 is 913057826.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 628750319 - 2²⁰ = 627701743 is a prime.

It is a super-2 number, since 2×628750319² = 790653927285203522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628750399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314375159 + 314375160.

It is an arithmetic number, because the mean of its divisors is an integer number (314375160).

Almost surely, 2^628750319 is an apocalyptic number.

628750319 is a deficient number, since it is larger than the sum of its proper divisors (1).

628750319 is an equidigital number, since it uses as much as digits as its factorization.

628750319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 628750319 is about 25074.8941971846. The cubic root of 628750319 is about 856.6946855705.

The spelling of 628750319 in words is "six hundred twenty-eight million, seven hundred fifty thousand, three hundred nineteen".