1538379833 has 2 divisors, whose sum is σ = 1538379834. Its totient is φ = 1538379832.

The previous prime is 1538379779. The next prime is 1538379883. The reversal of 1538379833 is 3389738351.

It is a happy number.

It is an a-pointer prime, because the next prime (1538379883) can be obtained adding 1538379833 to its sum of digits (50).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1181434384 + 356945449 = 34372^2 + 18893^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1538379833 is a prime.

It is a super-2 number, since 2×1538379833² = 4733225021162215778, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1538379883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 769189916 + 769189917.

It is an arithmetic number, because the mean of its divisors is an integer number (769189917).

Almost surely, 2^1538379833 is an apocalyptic number.

It is an amenable number.

1538379833 is a deficient number, since it is larger than the sum of its proper divisors (1).

1538379833 is an equidigital number, since it uses as much as digits as its factorization.

1538379833 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 50.

The square root of 1538379833 is about 39222.1854694508. The cubic root of 1538379833 is about 1154.3952364550.

The spelling of 1538379833 in words is "one billion, five hundred thirty-eight million, three hundred seventy-nine thousand, eight hundred thirty-three".