505031089 has 2 divisors, whose sum is σ = 505031090. Its totient is φ = 505031088.

The previous prime is 505031083. The next prime is 505031129. The reversal of 505031089 is 980130505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 498182400 + 6848689 = 22320^2 + 2617^2 .

It is a cyclic number.

It is not a de Polignac number, because 505031089 - 2³ = 505031081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 505031089.

It is not a weakly prime, because it can be changed into another prime (505031081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252515544 + 252515545.

It is an arithmetic number, because the mean of its divisors is an integer number (252515545).

Almost surely, 2^505031089 is an apocalyptic number.

It is an amenable number.

505031089 is a deficient number, since it is larger than the sum of its proper divisors (1).

505031089 is an equidigital number, since it uses as much as digits as its factorization.

505031089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 505031089 is about 22472.8967647698. The cubic root of 505031089 is about 796.3537653183.

The spelling of 505031089 in words is "five hundred five million, thirty-one thousand, eighty-nine".