624129997 has 2 divisors, whose sum is σ = 624129998. Its totient is φ = 624129996.

The previous prime is 624129971. The next prime is 624130043. The reversal of 624129997 is 799921426.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 616479241 + 7650756 = 24829^2 + 2766^2 .

It is a cyclic number.

It is not a de Polignac number, because 624129997 - 2¹¹ = 624127949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 624129997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (624129797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312064998 + 312064999.

It is an arithmetic number, because the mean of its divisors is an integer number (312064999).

Almost surely, 2^624129997 is an apocalyptic number.

It is an amenable number.

624129997 is a deficient number, since it is larger than the sum of its proper divisors (1).

624129997 is an equidigital number, since it uses as much as digits as its factorization.

624129997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 49.

The square root of 624129997 is about 24982.5938805401. The cubic root of 624129997 is about 854.5910733315.

The spelling of 624129997 in words is "six hundred twenty-four million, one hundred twenty-nine thousand, nine hundred ninety-seven".