13981929 has 16 divisors (see below), whose sum is σ = 21134400. Its totient is φ = 8150976.

The previous prime is 13981927. The next prime is 13981937. The reversal of 13981929 is 92918931.

It is not a de Polignac number, because 13981929 - 2¹ = 13981927 is a prime.

It is a super-2 number, since 2×13981929² = 390988677122082, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13981921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8694 + ... + 10175.

It is an arithmetic number, because the mean of its divisors is an integer number (1320900).

Almost surely, 2^13981929 is an apocalyptic number.

13981929 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

13981929 is a deficient number, since it is larger than the sum of its proper divisors (7152471).

13981929 is a wasteful number, since it uses less digits than its factorization.

13981929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18904.

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

The square root of 13981929 is about 3739.2417680594. The cubic root of 13981929 is about 240.9104825275.

The spelling of 13981929 in words is "thirteen million, nine hundred eighty-one thousand, nine hundred twenty-nine".