625449613 has 2 divisors, whose sum is σ = 625449614. Its totient is φ = 625449612.

The previous prime is 625449599. The next prime is 625449647. The reversal of 625449613 is 316944526.

625449613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 571544649 + 53904964 = 23907^2 + 7342^2 .

It is a cyclic number.

It is not a de Polignac number, because 625449613 - 2⁹ = 625449101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (622449613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312724806 + 312724807.

It is an arithmetic number, because the mean of its divisors is an integer number (312724807).

Almost surely, 2^625449613 is an apocalyptic number.

It is an amenable number.

625449613 is a deficient number, since it is larger than the sum of its proper divisors (1).

625449613 is an equidigital number, since it uses as much as digits as its factorization.

625449613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 40.

The square root of 625449613 is about 25008.9906433666. The cubic root of 625449613 is about 855.1929448394.

The spelling of 625449613 in words is "six hundred twenty-five million, four hundred forty-nine thousand, six hundred thirteen".