32491081 has 4 divisors (see below), whose sum is σ = 37132672. Its totient is φ = 27849492.

The previous prime is 32491061. The next prime is 32491117. The reversal of 32491081 is 18019423.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 32491081 - 2¹¹ = 32489033 is a prime.

It is a super-2 number, since 2×32491081² = 2111340689097122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32491001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2320785 + ... + 2320798.

It is an arithmetic number, because the mean of its divisors is an integer number (9283168).

Almost surely, 2^32491081 is an apocalyptic number.

It is an amenable number.

32491081 is a deficient number, since it is larger than the sum of its proper divisors (4641591).

32491081 is an equidigital number, since it uses as much as digits as its factorization.

32491081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4641590.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 32491081 is about 5700.0948237727. The cubic root of 32491081 is about 319.0960196794.

The spelling of 32491081 in words is "thirty-two million, four hundred ninety-one thousand, eighty-one".