1838729141 has 2 divisors, whose sum is σ = 1838729142. Its totient is φ = 1838729140.

The previous prime is 1838729119. The next prime is 1838729177. The reversal of 1838729141 is 1419278381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1526464900 + 312264241 = 39070^2 + 17671^2 .

It is a cyclic number.

It is not a de Polignac number, because 1838729141 - 2⁶ = 1838729077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1838729092 and 1838729101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1838629141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 919364570 + 919364571.

It is an arithmetic number, because the mean of its divisors is an integer number (919364571).

Almost surely, 2^1838729141 is an apocalyptic number.

It is an amenable number.

1838729141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1838729141 is an equidigital number, since it uses as much as digits as its factorization.

1838729141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 44.

The square root of 1838729141 is about 42880.4050937022. The cubic root of 1838729141 is about 1225.1029520027.

The spelling of 1838729141 in words is "one billion, eight hundred thirty-eight million, seven hundred twenty-nine thousand, one hundred forty-one".