89857861 has 2 divisors, whose sum is σ = 89857862. Its totient is φ = 89857860.

The previous prime is 89857837. The next prime is 89857891. The reversal of 89857861 is 16875898.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53012961 + 36844900 = 7281^2 + 6070^2 .

It is a cyclic number.

It is not a de Polignac number, because 89857861 - 2⁵ = 89857829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 89857799 and 89857808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89857811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44928930 + 44928931.

It is an arithmetic number, because the mean of its divisors is an integer number (44928931).

Almost surely, 2^89857861 is an apocalyptic number.

It is an amenable number.

89857861 is a deficient number, since it is larger than the sum of its proper divisors (1).

89857861 is an equidigital number, since it uses as much as digits as its factorization.

89857861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 967680, while the sum is 52.

The square root of 89857861 is about 9479.3386372679. The cubic root of 89857861 is about 447.9044309456.

The spelling of 89857861 in words is "eighty-nine million, eight hundred fifty-seven thousand, eight hundred sixty-one".