33239840891 has 4 divisors (see below), whose sum is σ = 33377765784. Its totient is φ = 33101916000.

The previous prime is 33239840873. The next prime is 33239840899. The reversal of 33239840891 is 19804893233.

It is a happy number.

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 33239840891 - 2²⁶ = 33172732027 is a prime.

It is a super-2 number, since 2×33239840891² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33239840899) 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, 68962085 + ... + 68962566.

It is an arithmetic number, because the mean of its divisors is an integer number (8344441446).

Almost surely, 2^33239840891 is an apocalyptic number.

33239840891 is a deficient number, since it is larger than the sum of its proper divisors (137924893).

33239840891 is a wasteful number, since it uses less digits than its factorization.

33239840891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137924892.

The product of its (nonzero) digits is 1119744, while the sum is 50.

The spelling of 33239840891 in words is "thirty-three billion, two hundred thirty-nine million, eight hundred forty thousand, eight hundred ninety-one".