123791623 has 4 divisors (see below), whose sum is σ = 126127368. Its totient is φ = 121455880.

The previous prime is 123791609. The next prime is 123791641. The reversal of 123791623 is 326197321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123791623 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 (123791653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1167793 + ... + 1167898.

It is an arithmetic number, because the mean of its divisors is an integer number (31531842).

Almost surely, 2^123791623 is an apocalyptic number.

123791623 is a deficient number, since it is larger than the sum of its proper divisors (2335745).

123791623 is an equidigital number, since it uses as much as digits as its factorization.

123791623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2335744.

The product of its digits is 13608, while the sum is 34.

The square root of 123791623 is about 11126.1683880840. The cubic root of 123791623 is about 498.3836108699.

The spelling of 123791623 in words is "one hundred twenty-three million, seven hundred ninety-one thousand, six hundred twenty-three".