31893318771889 has 9 divisors (see below), whose sum is σ = 33879855837121. Its totient is φ = 30017150838400.

The previous prime is 31893318771863. The next prime is 31893318771901. The reversal of 31893318771889 is 98817781339813.

The square root of 31893318771889 is 5647417.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 436835074225 + 31456483697664 = 660935^2 + 5608608^2 .

It is not a de Polignac number, because 31893318771889 - 2¹⁷ = 31893318640817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31893318771289) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 95839989 + ... + 96172189.

Almost surely, 2^{31893318771889} is an apocalyptic number.

31893318771889 is the 5647417-th square number.

31893318771889 is the 2823709-th centered octagonal number.

It is an amenable number.

31893318771889 is a deficient number, since it is larger than the sum of its proper divisors (1986537065232).

31893318771889 is an frugal number, since it uses more digits than its factorization.

31893318771889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664436 (or 332218 counting only the distinct ones).

The product of its digits is 438939648, while the sum is 76.

The spelling of 31893318771889 in words is "thirty-one trillion, eight hundred ninety-three billion, three hundred eighteen million, seven hundred seventy-one thousand, eight hundred eighty-nine".