501105491 has 2 divisors, whose sum is σ = 501105492. Its totient is φ = 501105490.

The previous prime is 501105463. The next prime is 501105547. The reversal of 501105491 is 194501105.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 501105491 - 2²⁶ = 433996627 is a prime.

It is a super-2 number, since 2×501105491² = 502213426220702162, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 501105491.

It is not a weakly prime, because it can be changed into another prime (501105401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250552745 + 250552746.

It is an arithmetic number, because the mean of its divisors is an integer number (250552746).

Almost surely, 2^501105491 is an apocalyptic number.

501105491 is a deficient number, since it is larger than the sum of its proper divisors (1).

501105491 is an equidigital number, since it uses as much as digits as its factorization.

501105491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 26.

The square root of 501105491 is about 22385.3856567181. The cubic root of 501105491 is about 794.2850479318.

Adding to 501105491 its reverse (194501105), we get a palindrome (695606596).

The spelling of 501105491 in words is "five hundred one million, one hundred five thousand, four hundred ninety-one".