1985073133 has 6 divisors (see below), whose sum is σ = 1992983946. Its totient is φ = 1977167952.

The previous prime is 1985073131. The next prime is 1985073137. The reversal of 1985073133 is 3313705891.

It can be written as a sum of positive squares in 3 ways, for example, as 351862564 + 1633210569 = 18758^2 + 40413^2 .

It is not a de Polignac number, because 1985073133 - 2¹ = 1985073131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985073131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 740191 + ... + 742867.

It is an arithmetic number, because the mean of its divisors is an integer number (332163991).

Almost surely, 2^1985073133 is an apocalyptic number.

It is an amenable number.

1985073133 is a deficient number, since it is larger than the sum of its proper divisors (7910813).

1985073133 is an frugal number, since it uses more digits than its factorization.

1985073133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5631 (or 2954 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 1985073133 is about 44554.1595476786. The cubic root of 1985073133 is about 1256.7787738343.

The spelling of 1985073133 in words is "one billion, nine hundred eighty-five million, seventy-three thousand, one hundred thirty-three".