253123129 has 4 divisors (see below), whose sum is σ = 289283584. Its totient is φ = 216962676.

The previous prime is 253123121. The next prime is 253123151. The reversal of 253123129 is 921321352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 253123129 - 2³ = 253123121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 253123097 and 253123106.

It is not an unprimeable number, because it can be changed into a prime (253123121) 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, 18080217 + ... + 18080230.

It is an arithmetic number, because the mean of its divisors is an integer number (72320896).

Almost surely, 2^253123129 is an apocalyptic number.

It is an amenable number.

253123129 is a deficient number, since it is larger than the sum of its proper divisors (36160455).

253123129 is an equidigital number, since it uses as much as digits as its factorization.

253123129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36160454.

The product of its digits is 3240, while the sum is 28.

The square root of 253123129 is about 15909.8437767314. The cubic root of 253123129 is about 632.5729403922.

It can be divided in two parts, 25312 and 3129, that added together give a triangular number (28441 = T₂₃₈).

The spelling of 253123129 in words is "two hundred fifty-three million, one hundred twenty-three thousand, one hundred twenty-nine".