625213993 has 2 divisors, whose sum is σ = 625213994. Its totient is φ = 625213992.

The previous prime is 625213969. The next prime is 625213997. The reversal of 625213993 is 399312526.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 591073344 + 34140649 = 24312^2 + 5843^2 .

It is a cyclic number.

It is not a de Polignac number, because 625213993 - 2²¹ = 623116841 is a prime.

It is not a weakly prime, because it can be changed into another prime (625213997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312606996 + 312606997.

It is an arithmetic number, because the mean of its divisors is an integer number (312606997).

Almost surely, 2^625213993 is an apocalyptic number.

It is an amenable number.

625213993 is a deficient number, since it is larger than the sum of its proper divisors (1).

625213993 is an equidigital number, since it uses as much as digits as its factorization.

625213993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87480, while the sum is 40.

The square root of 625213993 is about 25004.2794937187. The cubic root of 625213993 is about 855.0855416392.

The spelling of 625213993 in words is "six hundred twenty-five million, two hundred thirteen thousand, nine hundred ninety-three".