32104991 has 4 divisors (see below), whose sum is σ = 32339472. Its totient is φ = 31870512.

The previous prime is 32104957. The next prime is 32105023. The reversal of 32104991 is 19940123.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19940123 = 7 ⋅2848589.

It is a cyclic number.

It is not a de Polignac number, because 32104991 - 2¹⁴ = 32088607 is a prime.

It is a super-2 number, since 2×32104991² = 2061460894220162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32104921) 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, 117035 + ... + 117308.

It is an arithmetic number, because the mean of its divisors is an integer number (8084868).

Almost surely, 2^32104991 is an apocalyptic number.

32104991 is a deficient number, since it is larger than the sum of its proper divisors (234481).

32104991 is a wasteful number, since it uses less digits than its factorization.

32104991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234480.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 32104991 is about 5666.1266311299. The cubic root of 32104991 is about 317.8270455676.

The spelling of 32104991 in words is "thirty-two million, one hundred four thousand, nine hundred ninety-one".