123136331 has 8 divisors (see below), whose sum is σ = 125652384. Its totient is φ = 120627520.

The previous prime is 123136313. The next prime is 123136339. The reversal of 123136331 is 133631321.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123136331 - 2⁶ = 123136267 is a prime.

It is a super-2 number, since 2×123136331² = 30325112024283122, 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 = 123136297 and 123136306.

It is not an unprimeable number, because it can be changed into a prime (123136339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44066 + ... + 46776.

It is an arithmetic number, because the mean of its divisors is an integer number (15706548).

Almost surely, 2^123136331 is an apocalyptic number.

123136331 is a deficient number, since it is larger than the sum of its proper divisors (2516053).

123136331 is an equidigital number, since it uses as much as digits as its factorization.

123136331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3621.

The product of its digits is 972, while the sum is 23.

The square root of 123136331 is about 11096.6810803952. The cubic root of 123136331 is about 497.5026553060.

Adding to 123136331 its reverse (133631321), we get a palindrome (256767652).

The spelling of 123136331 in words is "one hundred twenty-three million, one hundred thirty-six thousand, three hundred thirty-one".