13722239 has 2 divisors, whose sum is σ = 13722240. Its totient is φ = 13722238.

The previous prime is 13722229. The next prime is 13722277. The reversal of 13722239 is 93222731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13722239 - 2²⁰ = 12673663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13722209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6861119 + 6861120.

It is an arithmetic number, because the mean of its divisors is an integer number (6861120).

Almost surely, 2^13722239 is an apocalyptic number.

13722239 is a deficient number, since it is larger than the sum of its proper divisors (1).

13722239 is an equidigital number, since it uses as much as digits as its factorization.

13722239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 29.

The square root of 13722239 is about 3704.3540597518. The cubic root of 13722239 is about 239.4096543983.

The spelling of 13722239 in words is "thirteen million, seven hundred twenty-two thousand, two hundred thirty-nine".