13937999 has 2 divisors, whose sum is σ = 13938000. Its totient is φ = 13937998.

The previous prime is 13937953. The next prime is 13938019. The reversal of 13937999 is 99973931.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13937999 - 2⁸ = 13937743 is a prime.

It is a super-2 number, since 2×13937999² = 388535632248002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13937929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6968999 + 6969000.

It is an arithmetic number, because the mean of its divisors is an integer number (6969000).

Almost surely, 2^13937999 is an apocalyptic number.

13937999 is a deficient number, since it is larger than the sum of its proper divisors (1).

13937999 is an equidigital number, since it uses as much as digits as its factorization.

13937999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 413343, while the sum is 50.

The square root of 13937999 is about 3733.3629611920. The cubic root of 13937999 is about 240.6579112571.

The spelling of 13937999 in words is "thirteen million, nine hundred thirty-seven thousand, nine hundred ninety-nine".