13952639 has 2 divisors, whose sum is σ = 13952640. Its totient is φ = 13952638.

The previous prime is 13952633. The next prime is 13952641. The reversal of 13952639 is 93625931.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13952639 is a prime.

It is a super-2 number, since 2×13952639² = 389352270128642, which contains 22 as substring.

Together with 13952641, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13952633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6976319 + 6976320.

It is an arithmetic number, because the mean of its divisors is an integer number (6976320).

Almost surely, 2^13952639 is an apocalyptic number.

13952639 is a deficient number, since it is larger than the sum of its proper divisors (1).

13952639 is an equidigital number, since it uses as much as digits as its factorization.

13952639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43740, while the sum is 38.

The square root of 13952639 is about 3735.3231453249. The cubic root of 13952639 is about 240.7421414009.

The spelling of 13952639 in words is "thirteen million, nine hundred fifty-two thousand, six hundred thirty-nine".