123744429 has 10 divisors (see below), whose sum is σ = 184852910. Its totient is φ = 82496232.

The previous prime is 123744427. The next prime is 123744431. The reversal of 123744429 is 924447321.

It is an interprime number because it is at equal distance from previous prime (123744427) and next prime (123744431).

It can be written as a sum of positive squares in only one way, i.e., 107122500 + 16621929 = 10350^2 + 4077^2 .

It is not a de Polignac number, because 123744429 - 2¹ = 123744427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123744393 and 123744402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123744427) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 763774 + ... + 763935.

It is an arithmetic number, because the mean of its divisors is an integer number (18485291).

Almost surely, 2^123744429 is an apocalyptic number.

It is an amenable number.

123744429 is a deficient number, since it is larger than the sum of its proper divisors (61108481).

123744429 is an equidigital number, since it uses as much as digits as its factorization.

123744429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1527721 (or 1527712 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 123744429 is about 11124.0473299964. The cubic root of 123744429 is about 498.3202686577.

The spelling of 123744429 in words is "one hundred twenty-three million, seven hundred forty-four thousand, four hundred twenty-nine".