505667089 has 2 divisors, whose sum is σ = 505667090. Its totient is φ = 505667088.

The previous prime is 505667077. The next prime is 505667093. The reversal of 505667089 is 980766505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 399680064 + 105987025 = 19992^2 + 10295^2 .

It is a cyclic number.

It is not a de Polignac number, because 505667089 - 2²⁵ = 472112657 is a prime.

It is not a weakly prime, because it can be changed into another prime (505667059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252833544 + 252833545.

It is an arithmetic number, because the mean of its divisors is an integer number (252833545).

Almost surely, 2^505667089 is an apocalyptic number.

It is an amenable number.

505667089 is a deficient number, since it is larger than the sum of its proper divisors (1).

505667089 is an equidigital number, since it uses as much as digits as its factorization.

505667089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 453600, while the sum is 46.

The square root of 505667089 is about 22487.0426912922. The cubic root of 505667089 is about 796.6879153972.

The spelling of 505667089 in words is "five hundred five million, six hundred sixty-seven thousand, eighty-nine".