853861547 has 12 divisors (see below), whose sum is σ = 1072620528. Its totient is φ = 665346000.

The previous prime is 853861447. The next prime is 853861553. The reversal of 853861547 is 745168358.

It is not a de Polignac number, because 853861547 - 2⁸ = 853861291 is a prime.

It is not an unprimeable number, because it can be changed into a prime (853861597) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 503204 + ... + 504897.

It is an arithmetic number, because the mean of its divisors is an integer number (89385044).

Almost surely, 2^853861547 is an apocalyptic number.

853861547 is a deficient number, since it is larger than the sum of its proper divisors (218758981).

853861547 is a wasteful number, since it uses less digits than its factorization.

853861547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008130 (or 1008119 counting only the distinct ones).

The product of its digits is 806400, while the sum is 47.

The square root of 853861547 is about 29220.9094143218. The cubic root of 853861547 is about 948.7005491274.

The spelling of 853861547 in words is "eight hundred fifty-three million, eight hundred sixty-one thousand, five hundred forty-seven".