13949147 has 2 divisors, whose sum is σ = 13949148. Its totient is φ = 13949146.

The previous prime is 13949137. The next prime is 13949149. The reversal of 13949147 is 74194931.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13949147 is a prime.

Together with 13949149, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13949147.

It is not a weakly prime, because it can be changed into another prime (13949149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6974573 + 6974574.

It is an arithmetic number, because the mean of its divisors is an integer number (6974574).

Almost surely, 2^13949147 is an apocalyptic number.

13949147 is a deficient number, since it is larger than the sum of its proper divisors (1).

13949147 is an equidigital number, since it uses as much as digits as its factorization.

13949147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 38.

The square root of 13949147 is about 3734.8556866364. The cubic root of 13949147 is about 240.7220557932.

The spelling of 13949147 in words is "thirteen million, nine hundred forty-nine thousand, one hundred forty-seven".