234640091 has 4 divisors (see below), whose sum is σ = 268160112. Its totient is φ = 201120072.

The previous prime is 234640057. The next prime is 234640117. The reversal of 234640091 is 190046432.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-234640091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (234640391) 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, 16760000 + ... + 16760013.

It is an arithmetic number, because the mean of its divisors is an integer number (67040028).

Almost surely, 2^234640091 is an apocalyptic number.

234640091 is a deficient number, since it is larger than the sum of its proper divisors (33520021).

234640091 is an equidigital number, since it uses as much as digits as its factorization.

234640091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33520020.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 234640091 is about 15317.9662814618. The cubic root of 234640091 is about 616.7853827768.

The spelling of 234640091 in words is "two hundred thirty-four million, six hundred forty thousand, ninety-one".