853624861 has 2 divisors, whose sum is σ = 853624862. Its totient is φ = 853624860.

The previous prime is 853624847. The next prime is 853624903. The reversal of 853624861 is 168426358.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 700607961 + 153016900 = 26469^2 + 12370^2 .

It is a cyclic number.

It is not a de Polignac number, because 853624861 - 2²³ = 845236253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (853694861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426812430 + 426812431.

It is an arithmetic number, because the mean of its divisors is an integer number (426812431).

Almost surely, 2^853624861 is an apocalyptic number.

It is an amenable number.

853624861 is a deficient number, since it is larger than the sum of its proper divisors (1).

853624861 is an equidigital number, since it uses as much as digits as its factorization.

853624861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 276480, while the sum is 43.

The square root of 853624861 is about 29216.8591912272. The cubic root of 853624861 is about 948.6128827332.

The spelling of 853624861 in words is "eight hundred fifty-three million, six hundred twenty-four thousand, eight hundred sixty-one".