13729985 has 8 divisors (see below), whose sum is σ = 16512000. Its totient is φ = 10959984.

The previous prime is 13729973. The next prime is 13730023. The reversal of 13729985 is 58992731.

13729985 = T₂₃₄₁ + T₂₃₄₂ + ... + T₂₃₄₅.

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

It is a cyclic number.

It is not a de Polignac number, because 13729985 - 2¹² = 13725889 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257 + ... + 5246.

It is an arithmetic number, because the mean of its divisors is an integer number (2064000).

Almost surely, 2^13729985 is an apocalyptic number.

It is an amenable number.

13729985 is a deficient number, since it is larger than the sum of its proper divisors (2782015).

13729985 is an equidigital number, since it uses as much as digits as its factorization.

13729985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6007.

The product of its digits is 136080, while the sum is 44.

The square root of 13729985 is about 3705.3994386571. The cubic root of 13729985 is about 239.4546936555.

The spelling of 13729985 in words is "thirteen million, seven hundred twenty-nine thousand, nine hundred eighty-five".