500551091 has 2 divisors, whose sum is σ = 500551092. Its totient is φ = 500551090.

The previous prime is 500551063. The next prime is 500551099. The reversal of 500551091 is 190155005.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 500551091 - 2¹⁰ = 500550067 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 500551091.

It is not a weakly prime, because it can be changed into another prime (500551099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250275545 + 250275546.

It is an arithmetic number, because the mean of its divisors is an integer number (250275546).

Almost surely, 2^500551091 is an apocalyptic number.

500551091 is a deficient number, since it is larger than the sum of its proper divisors (1).

500551091 is an equidigital number, since it uses as much as digits as its factorization.

500551091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1125, while the sum is 26.

The square root of 500551091 is about 22372.9991507621. Note that the first 3 decimals coincide. The cubic root of 500551091 is about 793.9920197283.

The spelling of 500551091 in words is "five hundred million, five hundred fifty-one thousand, ninety-one".