13223897 has 4 divisors (see below), whose sum is σ = 13242036. Its totient is φ = 13205760.

The previous prime is 13223893. The next prime is 13223923. The reversal of 13223897 is 79832231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79832231 = 277 ⋅288203.

It can be written as a sum of positive squares in 2 ways, for example, as 292681 + 12931216 = 541^2 + 3596^2 .

It is a cyclic number.

It is not a de Polignac number, because 13223897 - 2² = 13223893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13223893) 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, 7928 + ... + 9449.

It is an arithmetic number, because the mean of its divisors is an integer number (3310509).

Almost surely, 2^13223897 is an apocalyptic number.

It is an amenable number.

13223897 is a deficient number, since it is larger than the sum of its proper divisors (18139).

13223897 is an equidigital number, since it uses as much as digits as its factorization.

13223897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18138.

The product of its digits is 18144, while the sum is 35.

The square root of 13223897 is about 3636.4676541941. The cubic root of 13223897 is about 236.4756816233.

The spelling of 13223897 in words is "thirteen million, two hundred twenty-three thousand, eight hundred ninety-seven".