123738929 has 4 divisors (see below), whose sum is σ = 123929076. Its totient is φ = 123548784.

The previous prime is 123738917. The next prime is 123738931. The reversal of 123738929 is 929837321.

It is a happy number.

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 44528929 + 79210000 = 6673^2 + 8900^2 .

It is a cyclic number.

It is not a de Polignac number, because 123738929 - 2⁸ = 123738673 is a prime.

It is a super-2 number, since 2×123738929² = 30622645100134082, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123738929.

It is not an unprimeable number, because it can be changed into a prime (123738959) 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, 94094 + ... + 95399.

It is an arithmetic number, because the mean of its divisors is an integer number (30982269).

Almost surely, 2^123738929 is an apocalyptic number.

It is an amenable number.

123738929 is a deficient number, since it is larger than the sum of its proper divisors (190147).

123738929 is an equidigital number, since it uses as much as digits as its factorization.

123738929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190146.

The product of its digits is 163296, while the sum is 44.

The square root of 123738929 is about 11123.8001150686. The cubic root of 123738929 is about 498.3128856935.

The spelling of 123738929 in words is "one hundred twenty-three million, seven hundred thirty-eight thousand, nine hundred twenty-nine".