613491625 has 8 divisors (see below), whose sum is σ = 765637704. Its totient is φ = 490793200.

The previous prime is 613491601. The next prime is 613491629. The reversal of 613491625 is 526194316.

It can be written as a sum of positive squares in 4 ways, for example, as 1819801 + 611671824 = 1349^2 + 24732^2 .

It is not a de Polignac number, because 613491625 - 2⁹ = 613491113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (613491629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2453842 + ... + 2454091.

It is an arithmetic number, because the mean of its divisors is an integer number (95704713).

Almost surely, 2^613491625 is an apocalyptic number.

It is an amenable number.

613491625 is a deficient number, since it is larger than the sum of its proper divisors (152146079).

613491625 is an equidigital number, since it uses as much as digits as its factorization.

613491625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4907948 (or 4907938 counting only the distinct ones).

The product of its digits is 38880, while the sum is 37.

The square root of 613491625 is about 24768.7630898275. The cubic root of 613491625 is about 849.7076849515.

The spelling of 613491625 in words is "six hundred thirteen million, four hundred ninety-one thousand, six hundred twenty-five".