626993 has 4 divisors (see below), whose sum is σ = 637680. Its totient is φ = 616308.

The previous prime is 626987. The next prime is 627017. The reversal of 626993 is 399626.

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, and also an emirpimes, since its reverse is a distinct semiprime: 399626 = 2 ⋅199813.

It is a cyclic number.

It is not a de Polignac number, because 626993 - 2⁶ = 626929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (626953) 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, 5255 + ... + 5372.

It is an arithmetic number, because the mean of its divisors is an integer number (159420).

2⁶²⁶⁹⁹³ is an apocalyptic number.

It is an amenable number.

626993 is a deficient number, since it is larger than the sum of its proper divisors (10687).

626993 is a wasteful number, since it uses less digits than its factorization.

626993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10686.

The product of its digits is 17496, while the sum is 35.

The square root of 626993 is about 791.8288956587. The cubic root of 626993 is about 85.5895804274.

The spelling of 626993 in words is "six hundred twenty-six thousand, nine hundred ninety-three".