13922749 has 4 divisors (see below), whose sum is σ = 14060700. Its totient is φ = 13784800.

The previous prime is 13922743. The next prime is 13922771. The reversal of 13922749 is 94722931.

13922749 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12830724 + 1092025 = 3582^2 + 1045^2 .

It is a cyclic number.

It is not a de Polignac number, because 13922749 - 2⁵ = 13922717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13922743) 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, 68824 + ... + 69025.

It is an arithmetic number, because the mean of its divisors is an integer number (3515175).

Almost surely, 2^13922749 is an apocalyptic number.

It is an amenable number.

13922749 is a deficient number, since it is larger than the sum of its proper divisors (137951).

13922749 is a wasteful number, since it uses less digits than its factorization.

13922749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137950.

The product of its digits is 27216, while the sum is 37.

The square root of 13922749 is about 3731.3200077184. The cubic root of 13922749 is about 240.5701087813.

The spelling of 13922749 in words is "thirteen million, nine hundred twenty-two thousand, seven hundred forty-nine".