123379787 has 4 divisors (see below), whose sum is σ = 129873480. Its totient is φ = 116886096.

The previous prime is 123379757. The next prime is 123379799. The reversal of 123379787 is 787973321.

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

It is a cyclic number.

It is not a de Polignac number, because 123379787 - 2⁶ = 123379723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123379757) 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, 3246818 + ... + 3246855.

It is an arithmetic number, because the mean of its divisors is an integer number (32468370).

Almost surely, 2^123379787 is an apocalyptic number.

123379787 is a deficient number, since it is larger than the sum of its proper divisors (6493693).

123379787 is an equidigital number, since it uses as much as digits as its factorization.

123379787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6493692.

The product of its digits is 444528, while the sum is 47.

The square root of 123379787 is about 11107.6454300630. The cubic root of 123379787 is about 497.8303145486.

The spelling of 123379787 in words is "one hundred twenty-three million, three hundred seventy-nine thousand, seven hundred eighty-seven".