1990885343 has 2 divisors, whose sum is σ = 1990885344. Its totient is φ = 1990885342.

The previous prime is 1990885331. The next prime is 1990885357. The reversal of 1990885343 is 3435880991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1990885343 - 2⁶ = 1990885279 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1990885291 and 1990885300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1990885373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 995442671 + 995442672.

It is an arithmetic number, because the mean of its divisors is an integer number (995442672).

Almost surely, 2^1990885343 is an apocalyptic number.

1990885343 is a deficient number, since it is larger than the sum of its proper divisors (1).

1990885343 is an equidigital number, since it uses as much as digits as its factorization.

1990885343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 933120, while the sum is 50.

The square root of 1990885343 is about 44619.3382178624. The cubic root of 1990885343 is about 1258.0041769631.

The spelling of 1990885343 in words is "one billion, nine hundred ninety million, eight hundred eighty-five thousand, three hundred forty-three".