628970399 has 2 divisors, whose sum is σ = 628970400. Its totient is φ = 628970398.

The previous prime is 628970389. The next prime is 628970401. The reversal of 628970399 is 993079826.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 628970399 - 2⁸ = 628970143 is a prime.

It is a Sophie Germain prime.

Together with 628970401, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 628970399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628970359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314485199 + 314485200.

It is an arithmetic number, because the mean of its divisors is an integer number (314485200).

Almost surely, 2^628970399 is an apocalyptic number.

628970399 is a deficient number, since it is larger than the sum of its proper divisors (1).

628970399 is an equidigital number, since it uses as much as digits as its factorization.

628970399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1469664, while the sum is 53.

The square root of 628970399 is about 25079.2822664445. The cubic root of 628970399 is about 856.7946295211.

The spelling of 628970399 in words is "six hundred twenty-eight million, nine hundred seventy thousand, three hundred ninety-nine".