609249625 has 8 divisors (see below), whose sum is σ = 760343688. Its totient is φ = 487399600.

The previous prime is 609249623. The next prime is 609249637. The reversal of 609249625 is 526942906.

It can be written as a sum of positive squares in 4 ways, for example, as 97042201 + 512207424 = 9851^2 + 22632^2 .

It is not a de Polignac number, because 609249625 - 2¹ = 609249623 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (609249623) 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, 2436874 + ... + 2437123.

It is an arithmetic number, because the mean of its divisors is an integer number (95042961).

Almost surely, 2^609249625 is an apocalyptic number.

It is an amenable number.

609249625 is a deficient number, since it is larger than the sum of its proper divisors (151094063).

609249625 is an equidigital number, since it uses as much as digits as its factorization.

609249625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4874012 (or 4874002 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 609249625 is about 24682.9824980694. The cubic root of 609249625 is about 847.7447134309.

The spelling of 609249625 in words is "six hundred nine million, two hundred forty-nine thousand, six hundred twenty-five".