13909998 has 8 divisors (see below), whose sum is σ = 27820008. Its totient is φ = 4636664.

The previous prime is 13909997. The next prime is 13909999. The reversal of 13909998 is 89990931.

It is an interprime number because it is at equal distance from previous prime (13909997) and next prime (13909999).

It is a sphenic number, since it is the product of 3 distinct primes.

13909998 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13909991) 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, 1159161 + ... + 1159172.

It is an arithmetic number, because the mean of its divisors is an integer number (3477501).

Almost surely, 2^13909998 is an apocalyptic number.

13909998 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

13909998 is a wasteful number, since it uses less digits than its factorization.

13909998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2318338.

The product of its (nonzero) digits is 157464, while the sum is 48.

The square root of 13909998 is about 3729.6109716698. The cubic root of 13909998 is about 240.4966451671.

The spelling of 13909998 in words is "thirteen million, nine hundred nine thousand, nine hundred ninety-eight".