123097129 has 4 divisors (see below), whose sum is σ = 126099540. Its totient is φ = 120094720.

The previous prime is 123097109. The next prime is 123097159. The reversal of 123097129 is 921790321.

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 20115225 + 102981904 = 4485^2 + 10148^2 .

It is a cyclic number.

It is not a de Polignac number, because 123097129 - 2⁵ = 123097097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123097094 and 123097103.

It is not an unprimeable number, because it can be changed into a prime (123097109) 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, 1501144 + ... + 1501225.

It is an arithmetic number, because the mean of its divisors is an integer number (31524885).

Almost surely, 2^123097129 is an apocalyptic number.

It is an amenable number.

123097129 is a deficient number, since it is larger than the sum of its proper divisors (3002411).

123097129 is an equidigital number, since it uses as much as digits as its factorization.

123097129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3002410.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 123097129 is about 11094.9145557773. The cubic root of 123097129 is about 497.4498542927.

The spelling of 123097129 in words is "one hundred twenty-three million, ninety-seven thousand, one hundred twenty-nine".