13981949 has 4 divisors (see below), whose sum is σ = 14071164. Its totient is φ = 13892736.

The previous prime is 13981937. The next prime is 13981951. The reversal of 13981949 is 94918931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2544025 + 11437924 = 1595^2 + 3382^2 .

It is a cyclic number.

It is not a de Polignac number, because 13981949 - 2¹² = 13977853 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 (13981969) 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, 44372 + ... + 44685.

It is an arithmetic number, because the mean of its divisors is an integer number (3517791).

Almost surely, 2^13981949 is an apocalyptic number.

It is an amenable number.

13981949 is a deficient number, since it is larger than the sum of its proper divisors (89215).

13981949 is an equidigital number, since it uses as much as digits as its factorization.

13981949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89214.

The product of its digits is 69984, while the sum is 44.

The square root of 13981949 is about 3739.2444423974. The cubic root of 13981949 is about 240.9105973950.

The spelling of 13981949 in words is "thirteen million, nine hundred eighty-one thousand, nine hundred forty-nine".