627998369 has 2 divisors, whose sum is σ = 627998370. Its totient is φ = 627998368.

The previous prime is 627998351. The next prime is 627998381. The reversal of 627998369 is 963899726.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 595360000 + 32638369 = 24400^2 + 5713^2 .

It is a cyclic number.

It is not a de Polignac number, because 627998369 - 2²⁸ = 359562913 is a prime.

It is a super-2 number, since 2×627998369² = 788763902933320322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (627998339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313999184 + 313999185.

It is an arithmetic number, because the mean of its divisors is an integer number (313999185).

Almost surely, 2^627998369 is an apocalyptic number.

It is an amenable number.

627998369 is a deficient number, since it is larger than the sum of its proper divisors (1).

627998369 is an equidigital number, since it uses as much as digits as its factorization.

627998369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8817984, while the sum is 59.

The square root of 627998369 is about 25059.8956302695. The cubic root of 627998369 is about 856.3530297888.

The spelling of 627998369 in words is "six hundred twenty-seven million, nine hundred ninety-eight thousand, three hundred sixty-nine".