1838434931 has 2 divisors, whose sum is σ = 1838434932. Its totient is φ = 1838434930.

The previous prime is 1838434901. The next prime is 1838434937. The reversal of 1838434931 is 1394348381.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1838434931 is a prime.

It is a super-2 number, since 2×1838434931² = 6759685991041949522, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1838434937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 919217465 + 919217466.

It is an arithmetic number, because the mean of its divisors is an integer number (919217466).

Almost surely, 2^1838434931 is an apocalyptic number.

1838434931 is a deficient number, since it is larger than the sum of its proper divisors (1).

1838434931 is an equidigital number, since it uses as much as digits as its factorization.

1838434931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 44.

The square root of 1838434931 is about 42876.9743685349. The cubic root of 1838434931 is about 1225.0376067311.

The spelling of 1838434931 in words is "one billion, eight hundred thirty-eight million, four hundred thirty-four thousand, nine hundred thirty-one".