1899473 has 2 divisors, whose sum is σ = 1899474. Its totient is φ = 1899472.

The previous prime is 1899437. The next prime is 1899481. The reversal of 1899473 is 3749981.

It is a happy number.

Together with previous prime (1899437) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1817104 + 82369 = 1348^2 + 287^2 .

It is a cyclic number.

It is not a de Polignac number, because 1899473 - 2²⁰ = 850897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1899473.

It is not a weakly prime, because it can be changed into another prime (1899673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 949736 + 949737.

It is an arithmetic number, because the mean of its divisors is an integer number (949737).

2^1899473 is an apocalyptic number.

It is an amenable number.

1899473 is a deficient number, since it is larger than the sum of its proper divisors (1).

1899473 is an equidigital number, since it uses as much as digits as its factorization.

1899473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 41.

The square root of 1899473 is about 1378.2136989596. The cubic root of 1899473 is about 123.8447806349.

The spelling of 1899473 in words is "one million, eight hundred ninety-nine thousand, four hundred seventy-three".