626980747 has 4 divisors (see below), whose sum is σ = 627346360. Its totient is φ = 626615136.

The previous prime is 626980729. The next prime is 626980769. The reversal of 626980747 is 747089626.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 747089626 = 2 ⋅373544813.

It is a cyclic number.

It is not a de Polignac number, because 626980747 - 2¹¹ = 626978699 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 626980747.

It is not an unprimeable number, because it can be changed into a prime (626980727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180222 + ... + 183667.

It is an arithmetic number, because the mean of its divisors is an integer number (156836590).

Almost surely, 2^626980747 is an apocalyptic number.

626980747 is a deficient number, since it is larger than the sum of its proper divisors (365613).

626980747 is a wasteful number, since it uses less digits than its factorization.

626980747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365612.

The product of its (nonzero) digits is 1016064, while the sum is 49.

The square root of 626980747 is about 25039.5836027678. The cubic root of 626980747 is about 855.8902287944.

The spelling of 626980747 in words is "six hundred twenty-six million, nine hundred eighty thousand, seven hundred forty-seven".