1804999969 has 2 divisors, whose sum is σ = 1804999970. Its totient is φ = 1804999968.

The previous prime is 1804999967. The next prime is 1805000051. The reversal of 1804999969 is 9699994081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1184392225 + 620607744 = 34415^2 + 24912^2 .

It is a cyclic number.

It is not a de Polignac number, because 1804999969 - 2¹ = 1804999967 is a prime.

It is a super-2 number, since 2×1804999969² = 6516049776180001922, which contains 22 as substring.

Together with 1804999967, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1804999969.

It is not a weakly prime, because it can be changed into another prime (1804999967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 902499984 + 902499985.

It is an arithmetic number, because the mean of its divisors is an integer number (902499985).

Almost surely, 2^1804999969 is an apocalyptic number.

It is an amenable number.

1804999969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1804999969 is an equidigital number, since it uses as much as digits as its factorization.

1804999969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11337408, while the sum is 64.

The square root of 1804999969 is about 42485.2912076639. The cubic root of 1804999969 is about 1217.5656845521.

The spelling of 1804999969 in words is "one billion, eight hundred four million, nine hundred ninety-nine thousand, nine hundred sixty-nine".