14139997 has 4 divisors (see below), whose sum is σ = 14440896. Its totient is φ = 13839100.

The previous prime is 14139959. The next prime is 14140001. The reversal of 14139997 is 79993141.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79993141 = 967 ⋅82723.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14139997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14139197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150379 + ... + 150472.

It is an arithmetic number, because the mean of its divisors is an integer number (3610224).

Almost surely, 2^14139997 is an apocalyptic number.

It is an amenable number.

14139997 is a deficient number, since it is larger than the sum of its proper divisors (300899).

14139997 is an equidigital number, since it uses as much as digits as its factorization.

14139997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300898.

The product of its digits is 61236, while the sum is 43.

The square root of 14139997 is about 3760.3187364903. The cubic root of 14139997 is about 241.8149269139.

It can be divided in two parts, 141399 and 97, that multiplied together give a triangular number (13715703 = T₅₂₃₇).

The spelling of 14139997 in words is "fourteen million, one hundred thirty-nine thousand, nine hundred ninety-seven".