13972187 has 2 divisors, whose sum is σ = 13972188. Its totient is φ = 13972186.

The previous prime is 13972169. The next prime is 13972193. The reversal of 13972187 is 78127931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13972187 - 2⁸ = 13971931 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13972187.

It is not a weakly prime, because it can be changed into another prime (13972787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6986093 + 6986094.

It is an arithmetic number, because the mean of its divisors is an integer number (6986094).

Almost surely, 2^13972187 is an apocalyptic number.

13972187 is a deficient number, since it is larger than the sum of its proper divisors (1).

13972187 is an equidigital number, since it uses as much as digits as its factorization.

13972187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 38.

The square root of 13972187 is about 3737.9388705542. The cubic root of 13972187 is about 240.8545175455.

The spelling of 13972187 in words is "thirteen million, nine hundred seventy-two thousand, one hundred eighty-seven".