623371913 has 4 divisors (see below), whose sum is σ = 638576148. Its totient is φ = 608167680.

The previous prime is 623371909. The next prime is 623371927. The reversal of 623371913 is 319173326.

623371913 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: 319173326 = 2 ⋅159586663.

It can be written as a sum of positive squares in 2 ways, for example, as 109579024 + 513792889 = 10468^2 + 22667^2 .

It is a cyclic number.

It is not a de Polignac number, because 623371913 - 2² = 623371909 is a prime.

It is not an unprimeable number, because it can be changed into a prime (623371013) 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, 7602056 + ... + 7602137.

It is an arithmetic number, because the mean of its divisors is an integer number (159644037).

Almost surely, 2^623371913 is an apocalyptic number.

It is an amenable number.

623371913 is a deficient number, since it is larger than the sum of its proper divisors (15204235).

623371913 is a wasteful number, since it uses less digits than its factorization.

623371913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15204234.

The product of its digits is 20412, while the sum is 35.

The square root of 623371913 is about 24967.4170269974. The cubic root of 623371913 is about 854.2449305415.

The spelling of 623371913 in words is "six hundred twenty-three million, three hundred seventy-one thousand, nine hundred thirteen".