12913223 has 4 divisors (see below), whose sum is σ = 13068888. Its totient is φ = 12757560.

The previous prime is 12913211. The next prime is 12913231. The reversal of 12913223 is 32231921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12913223 - 2⁸ = 12912967 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 (12913253) 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, 77708 + ... + 77873.

It is an arithmetic number, because the mean of its divisors is an integer number (3267222).

Almost surely, 2^12913223 is an apocalyptic number.

12913223 is a deficient number, since it is larger than the sum of its proper divisors (155665).

12913223 is an equidigital number, since it uses as much as digits as its factorization.

12913223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155664.

The product of its digits is 648, while the sum is 23.

The square root of 12913223 is about 3593.4973215518. The cubic root of 12913223 is about 234.6091162983.

The spelling of 12913223 in words is "twelve million, nine hundred thirteen thousand, two hundred twenty-three".