505869091 has 40 divisors (see below), whose sum is σ = 669775120. Its totient is φ = 378737856.

The previous prime is 505869059. The next prime is 505869097. The reversal of 505869091 is 190968505.

It is a happy number.

It is not a de Polignac number, because 505869091 - 2⁵ = 505869059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (505869097) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 592621 + ... + 593473.

It is an arithmetic number, because the mean of its divisors is an integer number (16744378).

Almost surely, 2^505869091 is an apocalyptic number.

505869091 is a deficient number, since it is larger than the sum of its proper divisors (163906029).

505869091 is an equidigital number, since it uses as much as digits as its factorization.

505869091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913 (or 892 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 43.

The square root of 505869091 is about 22491.5337627295. The cubic root of 505869091 is about 796.7939872450.

The spelling of 505869091 in words is "five hundred five million, eight hundred sixty-nine thousand, ninety-one".