1993600881 has 6 divisors (see below), whose sum is σ = 2879645730. Its totient is φ = 1329067248.

The previous prime is 1993600867. The next prime is 1993600909. The reversal of 1993600881 is 1880063991.

It can be written as a sum of positive squares in only one way, i.e., 1970560881 + 23040000 = 44391^2 + 4800^2 .

It is not a de Polignac number, because 1993600881 - 2⁵ = 1993600849 is a prime.

It is a super-2 number, since 2×1993600881² = 7948888945447952322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1993600181) 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, 110755596 + ... + 110755613.

It is an arithmetic number, because the mean of its divisors is an integer number (479940955).

Almost surely, 2^1993600881 is an apocalyptic number.

It is an amenable number.

1993600881 is a deficient number, since it is larger than the sum of its proper divisors (886044849).

1993600881 is a wasteful number, since it uses less digits than its factorization.

1993600881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221511215 (or 221511212 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 1993600881 is about 44649.7579052787. The cubic root of 1993600881 is about 1258.5758834383.

The spelling of 1993600881 in words is "one billion, nine hundred ninety-three million, six hundred thousand, eight hundred eighty-one".