123379785 has 12 divisors (see below), whose sum is σ = 213858372. Its totient is φ = 65802528.

The previous prime is 123379757. The next prime is 123379799. The reversal of 123379785 is 587973321.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 76265289 + 47114496 = 8733^2 + 6864^2 .

It is not a de Polignac number, because 123379785 - 2⁷ = 123379657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 2741773 = 123379785 / (1 + 2 + 3 + 3 + 7 + 9 + 7 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 123379785.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1370842 + ... + 1370931.

It is an arithmetic number, because the mean of its divisors is an integer number (17821531).

Almost surely, 2^123379785 is an apocalyptic number.

123379785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123379785 is a deficient number, since it is larger than the sum of its proper divisors (90478587).

123379785 is a wasteful number, since it uses less digits than its factorization.

123379785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2741784 (or 2741781 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 123379785 is about 11107.6453400349. The cubic root of 123379785 is about 497.8303118586.

It can be divided in two parts, 12337 and 9785, that added together give a palindrome (22122).

The spelling of 123379785 in words is "one hundred twenty-three million, three hundred seventy-nine thousand, seven hundred eighty-five".