13904985 has 16 divisors (see below), whose sum is σ = 22340736. Its totient is φ = 7385088.

The previous prime is 13904983. The next prime is 13904987. The reversal of 13904985 is 58940931.

It is an interprime number because it is at equal distance from previous prime (13904983) and next prime (13904987).

It is not a de Polignac number, because 13904985 - 2¹ = 13904983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13904981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2052 + ... + 5658.

It is an arithmetic number, because the mean of its divisors is an integer number (1396296).

Almost surely, 2^13904985 is an apocalyptic number.

13904985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13904985 is a deficient number, since it is larger than the sum of its proper divisors (8435751).

13904985 is a wasteful number, since it uses less digits than its factorization.

13904985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3872.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 13904985 is about 3728.9388571013. The cubic root of 13904985 is about 240.4677509731.

The spelling of 13904985 in words is "thirteen million, nine hundred four thousand, nine hundred eighty-five".