11923129 has 4 divisors (see below), whose sum is σ = 12003300. Its totient is φ = 11842960.

The previous prime is 11923097. The next prime is 11923157. The reversal of 11923129 is 92132911.

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 714025 + 11209104 = 845^2 + 3348^2 .

It is a cyclic number.

It is not a de Polignac number, because 11923129 - 2⁵ = 11923097 is a prime.

It is a super-2 number, since 2×11923129² = 284322010301282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11923097 and 11923106.

It is not an unprimeable number, because it can be changed into a prime (11923159) 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, 39862 + ... + 40159.

It is an arithmetic number, because the mean of its divisors is an integer number (3000825).

Almost surely, 2^11923129 is an apocalyptic number.

It is an amenable number.

11923129 is a deficient number, since it is larger than the sum of its proper divisors (80171).

11923129 is an equidigital number, since it uses as much as digits as its factorization.

11923129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80170.

The product of its digits is 972, while the sum is 28.

The square root of 11923129 is about 3452.9884158508. The cubic root of 11923129 is about 228.4529379717.

The spelling of 11923129 in words is "eleven million, nine hundred twenty-three thousand, one hundred twenty-nine".