13783649 has 4 divisors (see below), whose sum is σ = 15036720. Its totient is φ = 12530580.

The previous prime is 13783631. The next prime is 13783661. The reversal of 13783649 is 94638731.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94638731 = 11 ⋅8603521.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13783649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13783699) 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, 626519 + ... + 626540.

It is an arithmetic number, because the mean of its divisors is an integer number (3759180).

Almost surely, 2^13783649 is an apocalyptic number.

It is an amenable number.

13783649 is a deficient number, since it is larger than the sum of its proper divisors (1253071).

13783649 is a wasteful number, since it uses less digits than its factorization.

13783649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253070.

The product of its digits is 108864, while the sum is 41.

The square root of 13783649 is about 3712.6337012962. The cubic root of 13783649 is about 239.7662596986.

The spelling of 13783649 in words is "thirteen million, seven hundred eighty-three thousand, six hundred forty-nine".