627938869 has 2 divisors, whose sum is σ = 627938870. Its totient is φ = 627938868.

The previous prime is 627938851. The next prime is 627938873. The reversal of 627938869 is 968839726.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 592679025 + 35259844 = 24345^2 + 5938^2 .

It is a cyclic number.

It is not a de Polignac number, because 627938869 - 2¹¹ = 627936821 is a prime.

It is a super-2 number, since 2×627938869² = 788614446401998322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (627938849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313969434 + 313969435.

It is an arithmetic number, because the mean of its divisors is an integer number (313969435).

Almost surely, 2^627938869 is an apocalyptic number.

It is an amenable number.

627938869 is a deficient number, since it is larger than the sum of its proper divisors (1).

627938869 is an equidigital number, since it uses as much as digits as its factorization.

627938869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7838208, while the sum is 58.

The square root of 627938869 is about 25058.7084463665. The cubic root of 627938869 is about 856.3259837449.

The spelling of 627938869 in words is "six hundred twenty-seven million, nine hundred thirty-eight thousand, eight hundred sixty-nine".