1538229941 has 2 divisors, whose sum is σ = 1538229942. Its totient is φ = 1538229940.

The previous prime is 1538229907. The next prime is 1538229961. The reversal of 1538229941 is 1499228351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1342929316 + 195300625 = 36646^2 + 13975^2 .

It is a cyclic number.

It is not a de Polignac number, because 1538229941 - 2¹⁴ = 1538213557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1538229892 and 1538229901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1538229961) 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, 769114970 + 769114971.

It is an arithmetic number, because the mean of its divisors is an integer number (769114971).

Almost surely, 2^1538229941 is an apocalyptic number.

It is an amenable number.

1538229941 is a deficient number, since it is larger than the sum of its proper divisors (1).

1538229941 is an equidigital number, since it uses as much as digits as its factorization.

1538229941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 44.

The square root of 1538229941 is about 39220.2746165806. The cubic root of 1538229941 is about 1154.3577424137.

The spelling of 1538229941 in words is "one billion, five hundred thirty-eight million, two hundred twenty-nine thousand, nine hundred forty-one".