32090991 has 4 divisors (see below), whose sum is σ = 42787992. Its totient is φ = 21393992.

The previous prime is 32090977. The next prime is 32090999. The reversal of 32090991 is 19909023.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 32090991 - 2⁵ = 32090959 is a prime.

It is a super-3 number, since 3×32090991³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32090999) 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 in 3 ways as a sum of consecutive naturals, for example, 5348496 + ... + 5348501.

It is an arithmetic number, because the mean of its divisors is an integer number (10696998).

Almost surely, 2^32090991 is an apocalyptic number.

32090991 is a deficient number, since it is larger than the sum of its proper divisors (10697001).

32090991 is a wasteful number, since it uses less digits than its factorization.

32090991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10697000.

The product of its (nonzero) digits is 4374, while the sum is 33.

The square root of 32090991 is about 5664.8910845664. The cubic root of 32090991 is about 317.7808406482.

The spelling of 32090991 in words is "thirty-two million, ninety thousand, nine hundred ninety-one".