650090509 has 2 divisors, whose sum is σ = 650090510. Its totient is φ = 650090508.

The previous prime is 650090503. The next prime is 650090531. The reversal of 650090509 is 905090056.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 649485225 + 605284 = 25485^2 + 778^2 .

It is a cyclic number.

It is not a de Polignac number, because 650090509 - 2⁷ = 650090381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (650090503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325045254 + 325045255.

It is an arithmetic number, because the mean of its divisors is an integer number (325045255).

Almost surely, 2^650090509 is an apocalyptic number.

It is an amenable number.

650090509 is a deficient number, since it is larger than the sum of its proper divisors (1).

650090509 is an equidigital number, since it uses as much as digits as its factorization.

650090509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12150, while the sum is 34.

The square root of 650090509 is about 25496.8725337050. The cubic root of 650090509 is about 866.2793098519.

The spelling of 650090509 in words is "six hundred fifty million, ninety thousand, five hundred nine".