123872613 has 4 divisors (see below), whose sum is σ = 165163488. Its totient is φ = 82581740.

The previous prime is 123872597. The next prime is 123872627. The reversal of 123872613 is 316278321.

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 123872613 - 2⁴ = 123872597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123870613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20645433 + ... + 20645438.

It is an arithmetic number, because the mean of its divisors is an integer number (41290872).

Almost surely, 2^123872613 is an apocalyptic number.

It is an amenable number.

123872613 is a deficient number, since it is larger than the sum of its proper divisors (41290875).

123872613 is an equidigital number, since it uses as much as digits as its factorization.

123872613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41290874.

The product of its digits is 12096, while the sum is 33.

The square root of 123872613 is about 11129.8074107327. The cubic root of 123872613 is about 498.4922754365.

The spelling of 123872613 in words is "one hundred twenty-three million, eight hundred seventy-two thousand, six hundred thirteen".