625613 has 6 divisors (see below), whose sum is σ = 660654. Its totient is φ = 592344.

The previous prime is 625609. The next prime is 625621. The reversal of 625613 is 316526.

It can be written as a sum of positive squares in only one way, i.e., 521284 + 104329 = 722^2 + 323^2 .

It is not a de Polignac number, because 625613 - 2² = 625609 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 506 + ... + 1227.

It is an arithmetic number, because the mean of its divisors is an integer number (110109).

2⁶²⁵⁶¹³ is an apocalyptic number.

It is an amenable number.

625613 is a deficient number, since it is larger than the sum of its proper divisors (35041).

625613 is a wasteful number, since it uses less digits than its factorization.

625613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1771 (or 1752 counting only the distinct ones).

The product of its digits is 1080, while the sum is 23.

The square root of 625613 is about 790.9570152669. The cubic root of 625613 is about 85.5267406070.

The spelling of 625613 in words is "six hundred twenty-five thousand, six hundred thirteen".