1840497899 has 2 divisors, whose sum is σ = 1840497900. Its totient is φ = 1840497898.

The previous prime is 1840497887. The next prime is 1840497943. The reversal of 1840497899 is 9987940481.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1840497899 - 2²⁴ = 1823720683 is a prime.

It is not a weakly prime, because it can be changed into another prime (1840497829) 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, 920248949 + 920248950.

It is an arithmetic number, because the mean of its divisors is an integer number (920248950).

Almost surely, 2^1840497899 is an apocalyptic number.

1840497899 is a deficient number, since it is larger than the sum of its proper divisors (1).

1840497899 is an equidigital number, since it uses as much as digits as its factorization.

1840497899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5225472, while the sum is 59.

The square root of 1840497899 is about 42901.0244516375. The cubic root of 1840497899 is about 1225.4956537068.

The spelling of 1840497899 in words is "one billion, eight hundred forty million, four hundred ninety-seven thousand, eight hundred ninety-nine".