123113009 has 4 divisors (see below), whose sum is σ = 123262704. Its totient is φ = 122963316.

The previous prime is 123112981. The next prime is 123113017. The reversal of 123113009 is 900311321.

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 a cyclic number.

It is not a de Polignac number, because 123113009 - 2¹² = 123108913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123113209) 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, 73607 + ... + 75260.

It is an arithmetic number, because the mean of its divisors is an integer number (30815676).

Almost surely, 2^123113009 is an apocalyptic number.

It is an amenable number.

123113009 is a deficient number, since it is larger than the sum of its proper divisors (149695).

123113009 is an equidigital number, since it uses as much as digits as its factorization.

123113009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149694.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 123113009 is about 11095.6301758846. The cubic root of 123113009 is about 497.4712443503.

The spelling of 123113009 in words is "one hundred twenty-three million, one hundred thirteen thousand, nine".