13982991 has 8 divisors (see below), whose sum is σ = 20338944. Its totient is φ = 8474520.

The previous prime is 13982989. The next prime is 13982999. The reversal of 13982991 is 19928931.

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

It is not a de Polignac number, because 13982991 - 2¹ = 13982989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13982999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211831 + ... + 211896.

It is an arithmetic number, because the mean of its divisors is an integer number (2542368).

Almost surely, 2^13982991 is an apocalyptic number.

13982991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13982991 is a deficient number, since it is larger than the sum of its proper divisors (6355953).

13982991 is a wasteful number, since it uses less digits than its factorization.

13982991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423741.

The product of its digits is 34992, while the sum is 42.

The square root of 13982991 is about 3739.3837727626. The cubic root of 13982991 is about 240.9165818398.

The spelling of 13982991 in words is "thirteen million, nine hundred eighty-two thousand, nine hundred ninety-one".