626956993 has 4 divisors (see below), whose sum is σ = 675184468. Its totient is φ = 578729520.

The previous prime is 626956969. The next prime is 626956997. The reversal of 626956993 is 399659626.

626956993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 112211649 + 514745344 = 10593^2 + 22688^2 .

It is a cyclic number.

It is not a de Polignac number, because 626956993 - 2²¹ = 624859841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (626956997) 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, 24113718 + ... + 24113743.

It is an arithmetic number, because the mean of its divisors is an integer number (168796117).

Almost surely, 2^626956993 is an apocalyptic number.

It is an amenable number.

626956993 is a deficient number, since it is larger than the sum of its proper divisors (48227475).

626956993 is a wasteful number, since it uses less digits than its factorization.

626956993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48227474.

The product of its digits is 4723920, while the sum is 55.

The square root of 626956993 is about 25039.1092693011. The cubic root of 626956993 is about 855.8794198111.

The spelling of 626956993 in words is "six hundred twenty-six million, nine hundred fifty-six thousand, nine hundred ninety-three".