625687 has 4 divisors (see below), whose sum is σ = 628000. Its totient is φ = 623376.

The previous prime is 625663. The next prime is 625697. The reversal of 625687 is 786526.

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

It is a cyclic number.

It is not a de Polignac number, because 625687 - 2¹⁵ = 592919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 687 + ... + 1312.

It is an arithmetic number, because the mean of its divisors is an integer number (157000).

625687 is a Friedman number, since it can be written as 6+(785+6)^2, using all its digits and the basic arithmetic operations.

2⁶²⁵⁶⁸⁷ is an apocalyptic number.

625687 is a deficient number, since it is larger than the sum of its proper divisors (2313).

625687 is a wasteful number, since it uses less digits than its factorization.

625687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2312.

The product of its digits is 20160, while the sum is 34.

The square root of 625687 is about 791.0037926584. The cubic root of 625687 is about 85.5301126221.

The spelling of 625687 in words is "six hundred twenty-five thousand, six hundred eighty-seven".