536261809 has 2 divisors, whose sum is σ = 536261810. Its totient is φ = 536261808.

The previous prime is 536261779. The next prime is 536261867. The reversal of 536261809 is 908162635.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 274631184 + 261630625 = 16572^2 + 16175^2 .

It is a cyclic number.

It is not a de Polignac number, because 536261809 - 2²³ = 527873201 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (536261899) 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, 268130904 + 268130905.

It is an arithmetic number, because the mean of its divisors is an integer number (268130905).

Almost surely, 2^536261809 is an apocalyptic number.

It is an amenable number.

536261809 is a deficient number, since it is larger than the sum of its proper divisors (1).

536261809 is an equidigital number, since it uses as much as digits as its factorization.

536261809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 536261809 is about 23157.3273285153. The cubic root of 536261809 is about 812.4418560049.

The spelling of 536261809 in words is "five hundred thirty-six million, two hundred sixty-one thousand, eight hundred nine".