14457991 has 4 divisors (see below), whose sum is σ = 14465800. Its totient is φ = 14450184.

The previous prime is 14457959. The next prime is 14458001. The reversal of 14457991 is 19975441.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 14457991 - 2⁵ = 14457959 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 (14457901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 625 + ... + 5413.

It is an arithmetic number, because the mean of its divisors is an integer number (3616450).

Almost surely, 2^14457991 is an apocalyptic number.

14457991 is a deficient number, since it is larger than the sum of its proper divisors (7809).

14457991 is an equidigital number, since it uses as much as digits as its factorization.

14457991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7808.

The product of its digits is 45360, while the sum is 40.

The square root of 14457991 is about 3802.3664999576. The cubic root of 14457991 is about 243.6142284859.

The spelling of 14457991 in words is "fourteen million, four hundred fifty-seven thousand, nine hundred ninety-one".