13947149 has 4 divisors (see below), whose sum is σ = 13957020. Its totient is φ = 13937280.

The previous prime is 13947139. The next prime is 13947163. The reversal of 13947149 is 94174931.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 94174931 = 31 ⋅3037901.

It can be written as a sum of positive squares in 2 ways, for example, as 3822025 + 10125124 = 1955^2 + 3182^2 .

It is a cyclic number.

It is not a de Polignac number, because 13947149 - 2¹² = 13943053 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 (13947119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2372 + ... + 5789.

It is an arithmetic number, because the mean of its divisors is an integer number (3489255).

Almost surely, 2^13947149 is an apocalyptic number.

It is an amenable number.

13947149 is a deficient number, since it is larger than the sum of its proper divisors (9871).

13947149 is an equidigital number, since it uses as much as digits as its factorization.

13947149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9870.

The product of its digits is 27216, while the sum is 38.

The square root of 13947149 is about 3734.5881968431. The cubic root of 13947149 is about 240.7105620047.

The spelling of 13947149 in words is "thirteen million, nine hundred forty-seven thousand, one hundred forty-nine".