13670649 has 24 divisors (see below), whose sum is σ = 20643272. Its totient is φ = 8709120.

The previous prime is 13670639. The next prime is 13670651. The reversal of 13670649 is 94607631.

13670649 is a `hidden beast` number, since 1 + 3 + 6 + 7 + 0 + 649 = 666.

13670649 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 710649 + 12960000 = 843^2 + 3600^2 .

It is not a de Polignac number, because 13670649 - 2⁵ = 13670617 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13670609) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19977 + ... + 20649.

Almost surely, 2^13670649 is an apocalyptic number.

It is an amenable number.

13670649 is a deficient number, since it is larger than the sum of its proper divisors (6972623).

13670649 is a wasteful number, since it uses less digits than its factorization.

13670649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777 (or 774 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 13670649 is about 3697.3840752619. The cubic root of 13670649 is about 239.1092501933.

The spelling of 13670649 in words is "thirteen million, six hundred seventy thousand, six hundred forty-nine".