32681381 has 2 divisors, whose sum is σ = 32681382. Its totient is φ = 32681380.

The previous prime is 32681377. The next prime is 32681393. The reversal of 32681381 is 18318623.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27730756 + 4950625 = 5266^2 + 2225^2 .

It is an emirp because it is prime and its reverse (18318623) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 32681381 - 2² = 32681377 is a prime.

It is a super-2 number, since 2×32681381² = 2136145328134322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32681351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16340690 + 16340691.

It is an arithmetic number, because the mean of its divisors is an integer number (16340691).

Almost surely, 2^32681381 is an apocalyptic number.

It is an amenable number.

32681381 is a deficient number, since it is larger than the sum of its proper divisors (1).

32681381 is an equidigital number, since it uses as much as digits as its factorization.

32681381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 32.

The square root of 32681381 is about 5716.7631575919. The cubic root of 32681381 is about 319.7177882968.

The spelling of 32681381 in words is "thirty-two million, six hundred eighty-one thousand, three hundred eighty-one".