1990873533 has 16 divisors (see below), whose sum is σ = 2900126016. Its totient is φ = 1204794240.

The previous prime is 1990873501. The next prime is 1990873571. The reversal of 1990873533 is 3353780991.

It is not a de Polignac number, because 1990873533 - 2⁵ = 1990873501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990873133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22216 + ... + 66897.

It is an arithmetic number, because the mean of its divisors is an integer number (181257876).

Almost surely, 2^1990873533 is an apocalyptic number.

It is an amenable number.

1990873533 is a deficient number, since it is larger than the sum of its proper divisors (909252483).

1990873533 is a wasteful number, since it uses less digits than its factorization.

1990873533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89804.

The product of its (nonzero) digits is 612360, while the sum is 48.

The square root of 1990873533 is about 44619.2058759454. The cubic root of 1990873533 is about 1258.0016894502.

The spelling of 1990873533 in words is "one billion, nine hundred ninety million, eight hundred seventy-three thousand, five hundred thirty-three".