32004991 has 2 divisors, whose sum is σ = 32004992. Its totient is φ = 32004990.

The previous prime is 32004977. The next prime is 32005027. The reversal of 32004991 is 19940023.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 32004991 - 2¹³ = 31996799 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32004941) 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, 16002495 + 16002496.

It is an arithmetic number, because the mean of its divisors is an integer number (16002496).

Almost surely, 2^32004991 is an apocalyptic number.

32004991 is a deficient number, since it is larger than the sum of its proper divisors (1).

32004991 is an equidigital number, since it uses as much as digits as its factorization.

32004991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 32004991 is about 5657.2953785356. The cubic root of 32004991 is about 317.4967151994.

The spelling of 32004991 in words is "thirty-two million, four thousand, nine hundred ninety-one".