13373649 has 27 divisors (see below), whose sum is σ = 20582107. Its totient is φ = 8367216.

The previous prime is 13373641. The next prime is 13373651. The reversal of 13373649 is 94637331.

The square root of 13373649 is 3657.

It is a perfect power (a square), and thus also a powerful number.

13373649 is a `hidden beast` number, since 1 + 3 + 3 + 7 + 3 + 649 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9641025 + 3732624 = 3105^2 + 1932^2 .

It is not a de Polignac number, because 13373649 - 2³ = 13373641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13373641) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 252307 + ... + 252359.

Almost surely, 2^13373649 is an apocalyptic number.

13373649 is the 3657-th square number.

13373649 is the 1829-th centered octagonal number.

It is an amenable number.

13373649 is a deficient number, since it is larger than the sum of its proper divisors (7208458).

13373649 is an equidigital number, since it uses as much as digits as its factorization.

13373649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 79 counting only the distinct ones).

The product of its digits is 40824, while the sum is 36.

The cubic root of 13373649 is about 237.3649773609.

Multiplying 13373649 by its sum of digits (36), we get a square (481451364 = 21942²).

The spelling of 13373649 in words is "thirteen million, three hundred seventy-three thousand, six hundred forty-nine".