626461393 has 8 divisors (see below), whose sum is σ = 665579880. Its totient is φ = 588510720.

The previous prime is 626461357. The next prime is 626461403. The reversal of 626461393 is 393164626.

It can be written as a sum of positive squares in 4 ways, for example, as 397483969 + 228977424 = 19937^2 + 15132^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 626461393 - 2⁹ = 626460881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (626461313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290848 + ... + 292993.

It is an arithmetic number, because the mean of its divisors is an integer number (83197485).

Almost surely, 2^626461393 is an apocalyptic number.

It is an amenable number.

626461393 is a deficient number, since it is larger than the sum of its proper divisors (39118487).

626461393 is a wasteful number, since it uses less digits than its factorization.

626461393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583907.

The product of its digits is 139968, while the sum is 40.

The square root of 626461393 is about 25029.2107945896. The cubic root of 626461393 is about 855.6538404588.

The spelling of 626461393 in words is "six hundred twenty-six million, four hundred sixty-one thousand, three hundred ninety-three".