12397723 has 4 divisors (see below), whose sum is σ = 13351408. Its totient is φ = 11444040.

The previous prime is 12397711. The next prime is 12397733. The reversal of 12397723 is 32779321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32779321 = 3967 ⋅8263.

It is a cyclic number.

It is not a de Polignac number, because 12397723 - 2⁵ = 12397691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12397733) 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, 476823 + ... + 476848.

It is an arithmetic number, because the mean of its divisors is an integer number (3337852).

Almost surely, 2^12397723 is an apocalyptic number.

12397723 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12397723 is a deficient number, since it is larger than the sum of its proper divisors (953685).

12397723 is an equidigital number, since it uses as much as digits as its factorization.

12397723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953684.

The product of its digits is 15876, while the sum is 34.

The square root of 12397723 is about 3521.0400452139. The cubic root of 12397723 is about 231.4447370604. Note that the first 3 decimals are identical.

The spelling of 12397723 in words is "twelve million, three hundred ninety-seven thousand, seven hundred twenty-three".