1890001849 has 2 divisors, whose sum is σ = 1890001850. Its totient is φ = 1890001848.

The previous prime is 1890001837. The next prime is 1890001853. The reversal of 1890001849 is 9481000981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 968454400 + 921547449 = 31120^2 + 30357^2 .

It is a cyclic number.

It is not a de Polignac number, because 1890001849 - 2¹¹ = 1889999801 is a prime.

It is not a weakly prime, because it can be changed into another prime (1890001829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 945000924 + 945000925.

It is an arithmetic number, because the mean of its divisors is an integer number (945000925).

Almost surely, 2^1890001849 is an apocalyptic number.

It is an amenable number.

1890001849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1890001849 is an equidigital number, since it uses as much as digits as its factorization.

1890001849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 1890001849 is about 43474.1515040834. The cubic root of 1890001849 is about 1236.3859931306.

The spelling of 1890001849 in words is "one billion, eight hundred ninety million, one thousand, eight hundred forty-nine".