852841609 has 2 divisors, whose sum is σ = 852841610. Its totient is φ = 852841608.

The previous prime is 852841559. The next prime is 852841631. The reversal of 852841609 is 906148258.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 851005584 + 1836025 = 29172^2 + 1355^2 .

It is a cyclic number.

It is not a de Polignac number, because 852841609 - 2¹⁵ = 852808841 is a prime.

It is not a weakly prime, because it can be changed into another prime (852842609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426420804 + 426420805.

It is an arithmetic number, because the mean of its divisors is an integer number (426420805).

Almost surely, 2^852841609 is an apocalyptic number.

It is an amenable number.

852841609 is a deficient number, since it is larger than the sum of its proper divisors (1).

852841609 is an equidigital number, since it uses as much as digits as its factorization.

852841609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 852841609 is about 29203.4520048572. The cubic root of 852841609 is about 948.3226575467.

The spelling of 852841609 in words is "eight hundred fifty-two million, eight hundred forty-one thousand, six hundred nine".