123154013 has 8 divisors (see below), whose sum is σ = 125273400. Its totient is φ = 121052160.

The previous prime is 123154007. The next prime is 123154027. The reversal of 123154013 is 310451321.

It can be written as a sum of positive squares in 4 ways, for example, as 2439844 + 120714169 = 1562^2 + 10987^2 .

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 123154013 - 2⁶ = 123153949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123154043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10193 + ... + 18713.

It is an arithmetic number, because the mean of its divisors is an integer number (15659175).

Almost surely, 2^123154013 is an apocalyptic number.

It is an amenable number.

123154013 is a deficient number, since it is larger than the sum of its proper divisors (2119387).

123154013 is an equidigital number, since it uses as much as digits as its factorization.

123154013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8767.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 123154013 is about 11097.4777765040. The cubic root of 123154013 is about 497.5264674521.

The spelling of 123154013 in words is "one hundred twenty-three million, one hundred fifty-four thousand, thirteen".