32891609 has 2 divisors, whose sum is σ = 32891610. Its totient is φ = 32891608.

The previous prime is 32891581. The next prime is 32891647. The reversal of 32891609 is 90619823.

It is an a-pointer prime, because the next prime (32891647) can be obtained adding 32891609 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17875984 + 15015625 = 4228^2 + 3875^2 .

It is a cyclic number.

It is not a de Polignac number, because 32891609 - 2¹² = 32887513 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (32891659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16445804 + 16445805.

It is an arithmetic number, because the mean of its divisors is an integer number (16445805).

Almost surely, 2^32891609 is an apocalyptic number.

It is an amenable number.

32891609 is a deficient number, since it is larger than the sum of its proper divisors (1).

32891609 is an equidigital number, since it uses as much as digits as its factorization.

32891609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 32891609 is about 5735.1206613288. The cubic root of 32891609 is about 320.4018681543.

The spelling of 32891609 in words is "thirty-two million, eight hundred ninety-one thousand, six hundred nine".