123886013 has 4 divisors (see below), whose sum is σ = 127882368. Its totient is φ = 119889660.

The previous prime is 123886001. The next prime is 123886033. The reversal of 123886013 is 310688321.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 310688321 = 3889 ⋅79889.

It is a cyclic number.

It is not a de Polignac number, because 123886013 - 2¹² = 123881917 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 (123886033) 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, 1998131 + ... + 1998192.

It is an arithmetic number, because the mean of its divisors is an integer number (31970592).

Almost surely, 2^123886013 is an apocalyptic number.

It is an amenable number.

123886013 is a deficient number, since it is larger than the sum of its proper divisors (3996355).

123886013 is an equidigital number, since it uses as much as digits as its factorization.

123886013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3996354.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 123886013 is about 11130.4093815097. The cubic root of 123886013 is about 498.5102496964.

The spelling of 123886013 in words is "one hundred twenty-three million, eight hundred eighty-six thousand, thirteen".