32491 has 2 divisors, whose sum is σ = 32492. Its totient is φ = 32490.

The previous prime is 32479. The next prime is 32497. The reversal of 32491 is 19423.

It is a strong prime.

It is an emirp because it is prime and its reverse (19423) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 32491 - 2⁷ = 32363 is a prime.

It is a Chen prime.

It is a plaindrome in base 11.

It is a nialpdrome in base 15.

It is not a weakly prime, because it can be changed into another prime (32497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16245 + 16246.

It is an arithmetic number, because the mean of its divisors is an integer number (16246).

2³²⁴⁹¹ is an apocalyptic number.

32491 is a deficient number, since it is larger than the sum of its proper divisors (1).

32491 is an equidigital number, since it uses as much as digits as its factorization.

32491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 19.

The square root of 32491 is about 180.2526005360. The cubic root of 32491 is about 31.9095754511.

The spelling of 32491 in words is "thirty-two thousand, four hundred ninety-one".