1540161439 has 2 divisors, whose sum is σ = 1540161440. Its totient is φ = 1540161438.

The previous prime is 1540161307. The next prime is 1540161463. The reversal of 1540161439 is 9341610451.

It is a strong prime.

It is an emirp because it is prime and its reverse (9341610451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1540161439 - 2¹³ = 1540153247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1540168439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770080719 + 770080720.

It is an arithmetic number, because the mean of its divisors is an integer number (770080720).

Almost surely, 2^1540161439 is an apocalyptic number.

1540161439 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540161439 is an equidigital number, since it uses as much as digits as its factorization.

1540161439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 1540161439 is about 39244.8906101164. The cubic root of 1540161439 is about 1154.8407016551.

The spelling of 1540161439 in words is "one billion, five hundred forty million, one hundred sixty-one thousand, four hundred thirty-nine".