1838389093 has 2 divisors, whose sum is σ = 1838389094. Its totient is φ = 1838389092.

The previous prime is 1838389043. The next prime is 1838389121. The reversal of 1838389093 is 3909838381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1192873444 + 645515649 = 34538^2 + 25407^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1838389093 is a prime.

It is a super-2 number, since 2×1838389093² = 6759348914522725298, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1838389093.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1838389043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 919194546 + 919194547.

It is an arithmetic number, because the mean of its divisors is an integer number (919194547).

Almost surely, 2^1838389093 is an apocalyptic number.

It is an amenable number.

1838389093 is a deficient number, since it is larger than the sum of its proper divisors (1).

1838389093 is an equidigital number, since it uses as much as digits as its factorization.

1838389093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1119744, while the sum is 52.

The square root of 1838389093 is about 42876.4398358819. The cubic root of 1838389093 is about 1225.0274252919.

The spelling of 1838389093 in words is "one billion, eight hundred thirty-eight million, three hundred eighty-nine thousand, ninety-three".