1799849 has 2 divisors, whose sum is σ = 1799850. Its totient is φ = 1799848.

The previous prime is 1799843. The next prime is 1799867. The reversal of 1799849 is 9489971.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 931225 + 868624 = 965^2 + 932^2 .

It is a cyclic number.

It is not a de Polignac number, because 1799849 - 2²⁰ = 751273 is a prime.

It is not a weakly prime, because it can be changed into another prime (1799843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 899924 + 899925.

It is an arithmetic number, because the mean of its divisors is an integer number (899925).

2^1799849 is an apocalyptic number.

It is an amenable number.

1799849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1799849 is an equidigital number, since it uses as much as digits as its factorization.

1799849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 47.

The square root of 1799849 is about 1341.5845109422. The cubic root of 1799849 is about 121.6406382886.

The spelling of 1799849 in words is "one million, seven hundred ninety-nine thousand, eight hundred forty-nine".