626346397 has 4 divisors (see below), whose sum is σ = 643274716. Its totient is φ = 609418080.

The previous prime is 626346389. The next prime is 626346403. The reversal of 626346397 is 793643626.

626346397 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, and also an emirpimes, since its reverse is a distinct semiprime: 793643626 = 2 ⋅396821813.

It can be written as a sum of positive squares in 2 ways, for example, as 528356196 + 97990201 = 22986^2 + 9899^2 .

It is a cyclic number.

It is not a de Polignac number, because 626346397 - 2³ = 626346389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (626346197) 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, 8464104 + ... + 8464177.

It is an arithmetic number, because the mean of its divisors is an integer number (160818679).

Almost surely, 2^626346397 is an apocalyptic number.

It is an amenable number.

626346397 is a deficient number, since it is larger than the sum of its proper divisors (16928319).

626346397 is a wasteful number, since it uses less digits than its factorization.

626346397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16928318.

The product of its digits is 979776, while the sum is 46.

The square root of 626346397 is about 25026.9134533206. The cubic root of 626346397 is about 855.6014813980.

The spelling of 626346397 in words is "six hundred twenty-six million, three hundred forty-six thousand, three hundred ninety-seven".