13991454 has 24 divisors (see below), whose sum is σ = 31438680. Its totient is φ = 4663656.

The previous prime is 13991449. The next prime is 13991479. The reversal of 13991454 is 45419931.

It is a happy number.

It is a super-3 number, since 3×13991454³ (a number of 22 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13909 + ... + 14880.

It is an arithmetic number, because the mean of its divisors is an integer number (1309945).

Almost surely, 2^13991454 is an apocalyptic number.

13991454 is an abundant number, since it is smaller than the sum of its proper divisors (17447226).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13991454 is an equidigital number, since it uses as much as digits as its factorization.

13991454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28806 (or 28794 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 13991454 is about 3740.5152051556. The cubic root of 13991454 is about 240.9651757789.

The spelling of 13991454 in words is "thirteen million, nine hundred ninety-one thousand, four hundred fifty-four".