15438149 has 2 divisors, whose sum is σ = 15438150. Its totient is φ = 15438148.

The previous prime is 15438131. The next prime is 15438151. The reversal of 15438149 is 94183451.

15438149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10125124 + 5313025 = 3182^2 + 2305^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15438149 is a prime.

Together with 15438151, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15438749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7719074 + 7719075.

It is an arithmetic number, because the mean of its divisors is an integer number (7719075).

Almost surely, 2^15438149 is an apocalyptic number.

It is an amenable number.

15438149 is a deficient number, since it is larger than the sum of its proper divisors (1).

15438149 is an equidigital number, since it uses as much as digits as its factorization.

15438149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 35.

The square root of 15438149 is about 3929.1410002697. The cubic root of 15438149 is about 248.9994623731. Note that the first 3 decimals are identical.

The spelling of 15438149 in words is "fifteen million, four hundred thirty-eight thousand, one hundred forty-nine".