1838434901 has 2 divisors, whose sum is σ = 1838434902. Its totient is φ = 1838434900.

The previous prime is 1838434891. The next prime is 1838434931. The reversal of 1838434901 is 1094348381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1838179876 + 255025 = 42874^2 + 505^2 .

It is a cyclic number.

It is not a de Polignac number, because 1838434901 - 2⁶ = 1838434837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1838434931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 919217450 + 919217451.

It is an arithmetic number, because the mean of its divisors is an integer number (919217451).

Almost surely, 2^1838434901 is an apocalyptic number.

It is an amenable number.

1838434901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1838434901 is an equidigital number, since it uses as much as digits as its factorization.

1838434901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 1838434901 is about 42876.9740186968. The cubic root of 1838434901 is about 1225.0376000676.

The spelling of 1838434901 in words is "one billion, eight hundred thirty-eight million, four hundred thirty-four thousand, nine hundred one".