13737985 has 4 divisors (see below), whose sum is σ = 16485588. Its totient is φ = 10990384.

The previous prime is 13737979. The next prime is 13738001. The reversal of 13737985 is 58973731.

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 10233601 + 3504384 = 3199^2 + 1872^2 .

It is a cyclic number.

It is not a de Polignac number, because 13737985 - 2⁵ = 13737953 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1373794 + ... + 1373803.

It is an arithmetic number, because the mean of its divisors is an integer number (4121397).

It is a Proth number, since it is equal to 1677 ⋅ 2¹³ + 1 and 1677 < 2¹³.

Almost surely, 2^13737985 is an apocalyptic number.

It is an amenable number.

13737985 is a deficient number, since it is larger than the sum of its proper divisors (2747603).

13737985 is an equidigital number, since it uses as much as digits as its factorization.

13737985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2747602.

The product of its digits is 158760, while the sum is 43.

The square root of 13737985 is about 3706.4787872049. The cubic root of 13737985 is about 239.5011920216.

Subtracting from 13737985 its product of digits (158760), we obtain a square (13579225 = 3685²).

The spelling of 13737985 in words is "thirteen million, seven hundred thirty-seven thousand, nine hundred eighty-five".