13750639 has 8 divisors (see below), whose sum is σ = 16222208. Its totient is φ = 11405880.

The previous prime is 13750609. The next prime is 13750657. The reversal of 13750639 is 93605731.

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 13750639 - 2¹⁹ = 13226351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13750609) 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, 31467 + ... + 31900.

It is an arithmetic number, because the mean of its divisors is an integer number (2027776).

Almost surely, 2^13750639 is an apocalyptic number.

13750639 is a deficient number, since it is larger than the sum of its proper divisors (2471569).

13750639 is an equidigital number, since it uses as much as digits as its factorization.

13750639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63405.

The product of its (nonzero) digits is 17010, while the sum is 34.

The square root of 13750639 is about 3708.1854052892. The cubic root of 13750639 is about 239.5747039681.

The spelling of 13750639 in words is "thirteen million, seven hundred fifty thousand, six hundred thirty-nine".