1538159849 has 2 divisors, whose sum is σ = 1538159850. Its totient is φ = 1538159848.

The previous prime is 1538159809. The next prime is 1538159851. The reversal of 1538159849 is 9489518351.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1071383824 + 466776025 = 32732^2 + 21605^2 .

It is a cyclic number.

It is not a de Polignac number, because 1538159849 - 2⁸ = 1538159593 is a prime.

Together with 1538159851, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1538159849.

It is not a weakly prime, because it can be changed into another prime (1538159809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 769079924 + 769079925.

It is an arithmetic number, because the mean of its divisors is an integer number (769079925).

Almost surely, 2^1538159849 is an apocalyptic number.

It is an amenable number.

1538159849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1538159849 is an equidigital number, since it uses as much as digits as its factorization.

1538159849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1555200, while the sum is 53.

The square root of 1538159849 is about 39219.3810379511. The cubic root of 1538159849 is about 1154.3402087387.

The spelling of 1538159849 in words is "one billion, five hundred thirty-eight million, one hundred fifty-nine thousand, eight hundred forty-nine".