1838980399 has 2 divisors, whose sum is σ = 1838980400. Its totient is φ = 1838980398.

The previous prime is 1838980369. The next prime is 1838980411. The reversal of 1838980399 is 9930898381.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1838980399 - 2²⁷ = 1704762671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1838980309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 919490199 + 919490200.

It is an arithmetic number, because the mean of its divisors is an integer number (919490200).

Almost surely, 2^1838980399 is an apocalyptic number.

1838980399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1838980399 is an equidigital number, since it uses as much as digits as its factorization.

1838980399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3359232, while the sum is 58.

The square root of 1838980399 is about 42883.3347467288. The cubic root of 1838980399 is about 1225.1587519374.

The spelling of 1838980399 in words is "one billion, eight hundred thirty-eight million, nine hundred eighty thousand, three hundred ninety-nine".