13649321 has 8 divisors (see below), whose sum is σ = 15813504. Its totient is φ = 11538720.

The previous prime is 13649303. The next prime is 13649341. The reversal of 13649321 is 12394631.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13649321 is a prime.

It is a super-2 number, since 2×13649321² = 372607927522082, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13649341) 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, 12845 + ... + 13866.

It is an arithmetic number, because the mean of its divisors is an integer number (1976688).

Almost surely, 2^13649321 is an apocalyptic number.

It is an amenable number.

13649321 is a deficient number, since it is larger than the sum of its proper divisors (2164183).

13649321 is an equidigital number, since it uses as much as digits as its factorization.

13649321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26791.

The product of its digits is 3888, while the sum is 29.

The square root of 13649321 is about 3694.4987481389. The cubic root of 13649321 is about 238.9848382392.

The spelling of 13649321 in words is "thirteen million, six hundred forty-nine thousand, three hundred twenty-one".