629973389 has 2 divisors, whose sum is σ = 629973390. Its totient is φ = 629973388.

The previous prime is 629973361. The next prime is 629973397. The reversal of 629973389 is 983379926.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 508863364 + 121110025 = 22558^2 + 11005^2 .

It is a cyclic number.

It is not a de Polignac number, because 629973389 - 2⁸ = 629973133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (629973319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314986694 + 314986695.

It is an arithmetic number, because the mean of its divisors is an integer number (314986695).

Almost surely, 2^629973389 is an apocalyptic number.

It is an amenable number.

629973389 is a deficient number, since it is larger than the sum of its proper divisors (1).

629973389 is an equidigital number, since it uses as much as digits as its factorization.

629973389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4408992, while the sum is 56.

The square root of 629973389 is about 25099.2706866156. The cubic root of 629973389 is about 857.2498179047.

The spelling of 629973389 in words is "six hundred twenty-nine million, nine hundred seventy-three thousand, three hundred eighty-nine".