123911393 has 4 divisors (see below), whose sum is σ = 125008068. Its totient is φ = 122814720.

The previous prime is 123911357. The next prime is 123911399. The reversal of 123911393 is 393119321.

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 27636049 + 96275344 = 5257^2 + 9812^2 .

It is a cyclic number.

It is not a de Polignac number, because 123911393 - 2⁶ = 123911329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123911399) 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, 548168 + ... + 548393.

It is an arithmetic number, because the mean of its divisors is an integer number (31252017).

Almost surely, 2^123911393 is an apocalyptic number.

It is an amenable number.

123911393 is a deficient number, since it is larger than the sum of its proper divisors (1096675).

123911393 is a wasteful number, since it uses less digits than its factorization.

123911393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096674.

The product of its digits is 4374, while the sum is 32.

The square root of 123911393 is about 11131.5494429122. The cubic root of 123911393 is about 498.5442899294.

The spelling of 123911393 in words is "one hundred twenty-three million, nine hundred eleven thousand, three hundred ninety-three".