32611981 has 2 divisors, whose sum is σ = 32611982. Its totient is φ = 32611980.

The previous prime is 32611939. The next prime is 32612023. The reversal of 32611981 is 18911623.

It is a balanced prime because it is at equal distance from previous prime (32611939) and next prime (32612023).

It can be written as a sum of positive squares in only one way, i.e., 26316900 + 6295081 = 5130^2 + 2509^2 .

It is an emirp because it is prime and its reverse (18911623) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 32611981 - 2⁷ = 32611853 is a prime.

It is a super-2 number, since 2×32611981² = 2127082609488722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2611981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16305990 + 16305991.

It is an arithmetic number, because the mean of its divisors is an integer number (16305991).

Almost surely, 2^32611981 is an apocalyptic number.

It is an amenable number.

32611981 is a deficient number, since it is larger than the sum of its proper divisors (1).

32611981 is an equidigital number, since it uses as much as digits as its factorization.

32611981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 31.

The square root of 32611981 is about 5710.6900633811. The cubic root of 32611981 is about 319.4913174610.

The spelling of 32611981 in words is "thirty-two million, six hundred eleven thousand, nine hundred eighty-one".