1819734499 has 4 divisors (see below), whose sum is σ = 1985164920. Its totient is φ = 1654304080.

The previous prime is 1819734491. The next prime is 1819734517. The reversal of 1819734499 is 9944379181.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1819734499 - 2³ = 1819734491 is a prime.

It is a super-2 number, since 2×1819734499² = 6622867293701562002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1819734491) 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 in 3 ways as a sum of consecutive naturals, for example, 82715194 + ... + 82715215.

It is an arithmetic number, because the mean of its divisors is an integer number (496291230).

Almost surely, 2^1819734499 is an apocalyptic number.

1819734499 is a deficient number, since it is larger than the sum of its proper divisors (165430421).

1819734499 is a wasteful number, since it uses less digits than its factorization.

1819734499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165430420.

The product of its digits is 1959552, while the sum is 55.

The square root of 1819734499 is about 42658.3461821951. The cubic root of 1819734499 is about 1220.8697772790.

The spelling of 1819734499 in words is "one billion, eight hundred nineteen million, seven hundred thirty-four thousand, four hundred ninety-nine".