1899049 has 2 divisors, whose sum is σ = 1899050. Its totient is φ = 1899048.

The previous prime is 1899047. The next prime is 1899059. The reversal of 1899049 is 9409981.

1899049 is nontrivially palindromic in base 5.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1841449 + 57600 = 1357^2 + 240^2 .

It is a cyclic number.

It is not a de Polignac number, because 1899049 - 2¹ = 1899047 is a prime.

Together with 1899047, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1899047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 949524 + 949525.

It is an arithmetic number, because the mean of its divisors is an integer number (949525).

2^1899049 is an apocalyptic number.

It is an amenable number.

1899049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1899049 is an equidigital number, since it uses as much as digits as its factorization.

1899049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 1899049 is about 1378.0598680754. The cubic root of 1899049 is about 123.8355650797.

The spelling of 1899049 in words is "one million, eight hundred ninety-nine thousand, forty-nine".