1993283881 has 4 divisors (see below), whose sum is σ = 2110535892. Its totient is φ = 1876031872.

The previous prime is 1993283867. The next prime is 1993283899. The reversal of 1993283881 is 1883823991.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1247502400 + 745781481 = 35320^2 + 27309^2 .

It is not a de Polignac number, because 1993283881 - 2¹¹ = 1993281833 is a prime.

It is a super-2 number, since 2×1993283881² = 7946361260508844322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1993283801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58625980 + ... + 58626013.

It is an arithmetic number, because the mean of its divisors is an integer number (527633973).

Almost surely, 2^1993283881 is an apocalyptic number.

It is an amenable number.

1993283881 is a deficient number, since it is larger than the sum of its proper divisors (117252011).

1993283881 is a wasteful number, since it uses less digits than its factorization.

1993283881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117252010.

The product of its digits is 746496, while the sum is 52.

The square root of 1993283881 is about 44646.2079128788. The cubic root of 1993283881 is about 1258.5091717063.

The spelling of 1993283881 in words is "one billion, nine hundred ninety-three million, two hundred eighty-three thousand, eight hundred eighty-one".