34231891 has 4 divisors (see below), whose sum is σ = 34262784. Its totient is φ = 34201000.

The previous prime is 34231877. The next prime is 34231909. The reversal of 34231891 is 19813243.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19813243 = 157 ⋅126199.

It is a cyclic number.

It is not a de Polignac number, because 34231891 - 2⁷ = 34231763 is a prime.

It is a super-2 number, since 2×34231891² = 2343644722871762, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (34231811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13720 + ... + 16021.

It is an arithmetic number, because the mean of its divisors is an integer number (8565696).

Almost surely, 2^34231891 is an apocalyptic number.

34231891 is a deficient number, since it is larger than the sum of its proper divisors (30893).

34231891 is a wasteful number, since it uses less digits than its factorization.

34231891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30892.

The product of its digits is 5184, while the sum is 31.

The square root of 34231891 is about 5850.8025945164. The cubic root of 34231891 is about 324.6960187253.

The spelling of 34231891 in words is "thirty-four million, two hundred thirty-one thousand, eight hundred ninety-one".