536390809 has 2 divisors, whose sum is σ = 536390810. Its totient is φ = 536390808.

The previous prime is 536390791. The next prime is 536390909. The reversal of 536390809 is 908093635.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 513158409 + 23232400 = 22653^2 + 4820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-536390809 is a prime.

It is not a weakly prime, because it can be changed into another prime (536390009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 268195404 + 268195405.

It is an arithmetic number, because the mean of its divisors is an integer number (268195405).

Almost surely, 2^536390809 is an apocalyptic number.

It is an amenable number.

536390809 is a deficient number, since it is larger than the sum of its proper divisors (1).

536390809 is an equidigital number, since it uses as much as digits as its factorization.

536390809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 43.

The square root of 536390809 is about 23160.1124565491. The cubic root of 536390809 is about 812.5069962001.

The spelling of 536390809 in words is "five hundred thirty-six million, three hundred ninety thousand, eight hundred nine".