625048509 has 4 divisors (see below), whose sum is σ = 833398016. Its totient is φ = 416699004.

The previous prime is 625048477. The next prime is 625048519. The reversal of 625048509 is 905840526.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 625048509 - 2⁵ = 625048477 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 (625048519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104174749 + ... + 104174754.

It is an arithmetic number, because the mean of its divisors is an integer number (208349504).

Almost surely, 2^625048509 is an apocalyptic number.

It is an amenable number.

625048509 is a deficient number, since it is larger than the sum of its proper divisors (208349507).

625048509 is a wasteful number, since it uses less digits than its factorization.

625048509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208349506.

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 625048509 is about 25000.9701611757. The cubic root of 625048509 is about 855.0100925590.

The spelling of 625048509 in words is "six hundred twenty-five million, forty-eight thousand, five hundred nine".