89020861 has 2 divisors, whose sum is σ = 89020862. Its totient is φ = 89020860.

The previous prime is 89020847. The next prime is 89020889. The reversal of 89020861 is 16802098.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65108761 + 23912100 = 8069^2 + 4890^2 .

It is a cyclic number.

It is not a de Polignac number, because 89020861 - 2¹⁵ = 88988093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89020801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44510430 + 44510431.

It is an arithmetic number, because the mean of its divisors is an integer number (44510431).

Almost surely, 2^89020861 is an apocalyptic number.

It is an amenable number.

89020861 is a deficient number, since it is larger than the sum of its proper divisors (1).

89020861 is an equidigital number, since it uses as much as digits as its factorization.

89020861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 89020861 is about 9435.0866980648. The cubic root of 89020861 is about 446.5093903717.

The spelling of 89020861 in words is "eighty-nine million, twenty thousand, eight hundred sixty-one".