626989 has 4 divisors (see below), whose sum is σ = 684000. Its totient is φ = 569980.

The previous prime is 626987. The next prime is 627017. The reversal of 626989 is 989626.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 626989 - 2¹ = 626987 is a prime.

It is a super-2 number, since 2×626989² = 786230412242, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (626987) 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, 28489 + ... + 28510.

It is an arithmetic number, because the mean of its divisors is an integer number (171000).

2⁶²⁶⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

626989 is a deficient number, since it is larger than the sum of its proper divisors (57011).

626989 is a wasteful number, since it uses less digits than its factorization.

626989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57010.

The product of its digits is 46656, while the sum is 40.

The square root of 626989 is about 791.8263698564. The cubic root of 626989 is about 85.5893984163.

The spelling of 626989 in words is "six hundred twenty-six thousand, nine hundred eighty-nine".