13919998 has 4 divisors (see below), whose sum is σ = 20880000. Its totient is φ = 6959998.

The previous prime is 13919993. The next prime is 13920019. The reversal of 13919998 is 89991931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89991931 = 17 ⋅5293643.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13919993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3479998 + ... + 3480001.

It is an arithmetic number, because the mean of its divisors is an integer number (5220000).

Almost surely, 2^13919998 is an apocalyptic number.

13919998 is a deficient number, since it is larger than the sum of its proper divisors (6960002).

13919998 is an equidigital number, since it uses as much as digits as its factorization.

13919998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6960001.

The product of its digits is 157464, while the sum is 49.

The square root of 13919998 is about 3730.9513532074. The cubic root of 13919998 is about 240.5542629651.

The spelling of 13919998 in words is "thirteen million, nine hundred nineteen thousand, nine hundred ninety-eight".