32880781 has 2 divisors, whose sum is σ = 32880782. Its totient is φ = 32880780.

The previous prime is 32880713. The next prime is 32880817. The reversal of 32880781 is 18708823.

Together with next prime (32880817) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32878756 + 2025 = 5734^2 + 45^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32880781 is a prime.

It is a super-2 number, since 2×32880781² = 2162291518339922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 32880781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32880481) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16440390 + 16440391.

It is an arithmetic number, because the mean of its divisors is an integer number (16440391).

Almost surely, 2^32880781 is an apocalyptic number.

It is an amenable number.

32880781 is a deficient number, since it is larger than the sum of its proper divisors (1).

32880781 is an equidigital number, since it uses as much as digits as its factorization.

32880781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 32880781 is about 5734.1765755861. The cubic root of 32880781 is about 320.3667052632.

The spelling of 32880781 in words is "thirty-two million, eight hundred eighty thousand, seven hundred eighty-one".