625354813 has 2 divisors, whose sum is σ = 625354814. Its totient is φ = 625354812.

The previous prime is 625354799. The next prime is 625354817. The reversal of 625354813 is 318453526.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 395134884 + 230219929 = 19878^2 + 15173^2 .

It is a cyclic number.

It is not a de Polignac number, because 625354813 - 2¹³ = 625346621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (625354817) 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, 312677406 + 312677407.

It is an arithmetic number, because the mean of its divisors is an integer number (312677407).

Almost surely, 2^625354813 is an apocalyptic number.

It is an amenable number.

625354813 is a deficient number, since it is larger than the sum of its proper divisors (1).

625354813 is an equidigital number, since it uses as much as digits as its factorization.

625354813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400, while the sum is 37.

The square root of 625354813 is about 25007.0952531477. The cubic root of 625354813 is about 855.1497351836.

The spelling of 625354813 in words is "six hundred twenty-five million, three hundred fifty-four thousand, eight hundred thirteen".