625538523 has 4 divisors (see below), whose sum is σ = 834051368. Its totient is φ = 417025680.

The previous prime is 625538519. The next prime is 625538569. The reversal of 625538523 is 325835526.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 625538523 - 2² = 625538519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (625538423) 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, 104256418 + ... + 104256423.

It is an arithmetic number, because the mean of its divisors is an integer number (208512842).

Almost surely, 2^625538523 is an apocalyptic number.

625538523 is a deficient number, since it is larger than the sum of its proper divisors (208512845).

625538523 is a wasteful number, since it uses less digits than its factorization.

625538523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208512844.

The product of its digits is 216000, while the sum is 39.

The square root of 625538523 is about 25010.7681409428. The cubic root of 625538523 is about 855.2334658772.

The spelling of 625538523 in words is "six hundred twenty-five million, five hundred thirty-eight thousand, five hundred twenty-three".