13649993 has 4 divisors (see below), whose sum is σ = 15600000. Its totient is φ = 11699988.

The previous prime is 13649989. The next prime is 13650001. The reversal of 13649993 is 39994631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13649993 - 2² = 13649989 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13649953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 974993 + ... + 975006.

It is an arithmetic number, because the mean of its divisors is an integer number (3900000).

Almost surely, 2^13649993 is an apocalyptic number.

It is an amenable number.

13649993 is a deficient number, since it is larger than the sum of its proper divisors (1950007).

13649993 is an equidigital number, since it uses as much as digits as its factorization.

13649993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1950006.

The product of its digits is 157464, while the sum is 44.

The square root of 13649993 is about 3694.5896930512. The cubic root of 13649993 is about 238.9887601724.

The spelling of 13649993 in words is "thirteen million, six hundred forty-nine thousand, nine hundred ninety-three".