32991061 has 2 divisors, whose sum is σ = 32991062. Its totient is φ = 32991060.

The previous prime is 32991059. The next prime is 32991071. The reversal of 32991061 is 16019923.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31979025 + 1012036 = 5655^2 + 1006^2 .

It is a cyclic number.

It is not a de Polignac number, because 32991061 - 2¹ = 32991059 is a prime.

Together with 32991059, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32991031) 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, 16495530 + 16495531.

It is an arithmetic number, because the mean of its divisors is an integer number (16495531).

Almost surely, 2^32991061 is an apocalyptic number.

It is an amenable number.

32991061 is a deficient number, since it is larger than the sum of its proper divisors (1).

32991061 is an equidigital number, since it uses as much as digits as its factorization.

32991061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 32991061 is about 5743.7845537590. The cubic root of 32991061 is about 320.7244686171.

The spelling of 32991061 in words is "thirty-two million, nine hundred ninety-one thousand, sixty-one".