505234091 has 4 divisors (see below), whose sum is σ = 506141712. Its totient is φ = 504326472.

The previous prime is 505234061. The next prime is 505234099. The reversal of 505234091 is 190432505.

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-505234091 is a prime.

It is a super-2 number, since 2×505234091² = 510522973417192562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505234099) 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, 452975 + ... + 454088.

It is an arithmetic number, because the mean of its divisors is an integer number (126535428).

Almost surely, 2^505234091 is an apocalyptic number.

505234091 is a deficient number, since it is larger than the sum of its proper divisors (907621).

505234091 is an equidigital number, since it uses as much as digits as its factorization.

505234091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907620.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 505234091 is about 22477.4129071831. The cubic root of 505234091 is about 796.4604516557.

Adding to 505234091 its reverse (190432505), we get a palindrome (695666596).

The spelling of 505234091 in words is "five hundred five million, two hundred thirty-four thousand, ninety-one".