626491 has 4 divisors (see below), whose sum is σ = 631552. Its totient is φ = 621432.

The previous prime is 626489. The next prime is 626519. The reversal of 626491 is 194626.

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 626491 - 2¹ = 626489 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (626191) 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, 2340 + ... + 2593.

It is an arithmetic number, because the mean of its divisors is an integer number (157888).

2⁶²⁶⁴⁹¹ is an apocalyptic number.

626491 is a deficient number, since it is larger than the sum of its proper divisors (5061).

626491 is a wasteful number, since it uses less digits than its factorization.

626491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5060.

The product of its digits is 2592, while the sum is 28.

The square root of 626491 is about 791.5118445102. The cubic root of 626491 is about 85.5667319844.

The spelling of 626491 in words is "six hundred twenty-six thousand, four hundred ninety-one".