1990895503 has 2 divisors, whose sum is σ = 1990895504. Its totient is φ = 1990895502.

The previous prime is 1990895461. The next prime is 1990895509. The reversal of 1990895503 is 3055980991.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1990895503 - 2⁹ = 1990894991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1990895509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 995447751 + 995447752.

It is an arithmetic number, because the mean of its divisors is an integer number (995447752).

Almost surely, 2^1990895503 is an apocalyptic number.

1990895503 is a deficient number, since it is larger than the sum of its proper divisors (1).

1990895503 is an equidigital number, since it uses as much as digits as its factorization.

1990895503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 437400, while the sum is 49.

The square root of 1990895503 is about 44619.4520696971. The cubic root of 1990895503 is about 1258.0063169324.

The spelling of 1990895503 in words is "one billion, nine hundred ninety million, eight hundred ninety-five thousand, five hundred three".