1538719141 has 2 divisors, whose sum is σ = 1538719142. Its totient is φ = 1538719140.

The previous prime is 1538719139. The next prime is 1538719157. The reversal of 1538719141 is 1419178351.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 958150116 + 580569025 = 30954^2 + 24095^2 .

It is an emirp because it is prime and its reverse (1419178351) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1538719141 - 2¹ = 1538719139 is a prime.

Together with 1538719139, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1538719094 and 1538719103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1538719121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 769359570 + 769359571.

It is an arithmetic number, because the mean of its divisors is an integer number (769359571).

Almost surely, 2^1538719141 is an apocalyptic number.

It is an amenable number.

1538719141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1538719141 is an equidigital number, since it uses as much as digits as its factorization.

1538719141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 40.

The square root of 1538719141 is about 39226.5106911130. The cubic root of 1538719141 is about 1154.4801020901.

The spelling of 1538719141 in words is "one billion, five hundred thirty-eight million, seven hundred nineteen thousand, one hundred forty-one".