13981965 has 8 divisors (see below), whose sum is σ = 22371168. Its totient is φ = 7457040.

The previous prime is 13981951. The next prime is 13981969. The reversal of 13981965 is 56918931.

13981965 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 13981965 - 2⁶ = 13981901 is a prime.

It is a super-2 number, since 2×13981965² = 390990690522450, which contains 22 as substring.

It is a Curzon 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 7 ways as a sum of consecutive naturals, for example, 466051 + ... + 466080.

It is an arithmetic number, because the mean of its divisors is an integer number (2796396).

Almost surely, 2^13981965 is an apocalyptic number.

13981965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13981965 is a deficient number, since it is larger than the sum of its proper divisors (8389203).

13981965 is an equidigital number, since it uses as much as digits as its factorization.

13981965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932139.

The product of its digits is 58320, while the sum is 42.

The square root of 13981965 is about 3739.2465818665. The cubic root of 13981965 is about 240.9106892889.

The spelling of 13981965 in words is "thirteen million, nine hundred eighty-one thousand, nine hundred sixty-five".