89866531 has 2 divisors, whose sum is σ = 89866532. Its totient is φ = 89866530.

The previous prime is 89866501. The next prime is 89866559. The reversal of 89866531 is 13566898.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 89866531 - 2¹³ = 89858339 is a prime.

It is a super-2 number, since 2×89866531² = 16151986787947922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (89866501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44933265 + 44933266.

It is an arithmetic number, because the mean of its divisors is an integer number (44933266).

Almost surely, 2^89866531 is an apocalyptic number.

89866531 is a deficient number, since it is larger than the sum of its proper divisors (1).

89866531 is an equidigital number, since it uses as much as digits as its factorization.

89866531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 46.

The square root of 89866531 is about 9479.7959366223. The cubic root of 89866531 is about 447.9188359421.

The spelling of 89866531 in words is "eighty-nine million, eight hundred sixty-six thousand, five hundred thirty-one".