625669 has 8 divisors (see below), whose sum is σ = 712512. Its totient is φ = 543840.

The previous prime is 625663. The next prime is 625697. The reversal of 625669 is 966526.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 625669 - 2³ = 625661 is a prime.

It is a super-2 number, since 2×625669² = 782923395122, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

625669 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 984 + ... + 1489.

It is an arithmetic number, because the mean of its divisors is an integer number (89064).

2⁶²⁵⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

625669 is a deficient number, since it is larger than the sum of its proper divisors (86843).

625669 is a wasteful number, since it uses less digits than its factorization.

625669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2507.

The product of its digits is 19440, while the sum is 34.

The square root of 625669 is about 790.9924146286. The cubic root of 625669 is about 85.5292924267.

The spelling of 625669 in words is "six hundred twenty-five thousand, six hundred sixty-nine".