32981981 has 2 divisors, whose sum is σ = 32981982. Its totient is φ = 32981980.

The previous prime is 32981969. The next prime is 32981987. The reversal of 32981981 is 18918923.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23921881 + 9060100 = 4891^2 + 3010^2 .

It is an emirp because it is prime and its reverse (18918923) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 32981981 - 2¹⁸ = 32719837 is a prime.

It is a super-2 number, since 2×32981981² = 2175622141368722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32981987) 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 as a sum of consecutive naturals, namely, 16490990 + 16490991.

It is an arithmetic number, because the mean of its divisors is an integer number (16490991).

Almost surely, 2^32981981 is an apocalyptic number.

It is an amenable number.

32981981 is a deficient number, since it is larger than the sum of its proper divisors (1).

32981981 is an equidigital number, since it uses as much as digits as its factorization.

32981981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 41.

The square root of 32981981 is about 5742.9940797462. The cubic root of 32981981 is about 320.6950420058.

The spelling of 32981981 in words is "thirty-two million, nine hundred eighty-one thousand, nine hundred eighty-one".