89211281 has 2 divisors, whose sum is σ = 89211282. Its totient is φ = 89211280.

The previous prime is 89211247. The next prime is 89211293. The reversal of 89211281 is 18211298.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65044225 + 24167056 = 8065^2 + 4916^2 .

It is a cyclic number.

It is not a de Polignac number, because 89211281 - 2²⁶ = 22102417 is a prime.

It is a super-2 number, since 2×89211281² = 15917305315321922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (89211581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44605640 + 44605641.

It is an arithmetic number, because the mean of its divisors is an integer number (44605641).

Almost surely, 2^89211281 is an apocalyptic number.

It is an amenable number.

89211281 is a deficient number, since it is larger than the sum of its proper divisors (1).

89211281 is an equidigital number, since it uses as much as digits as its factorization.

89211281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 32.

The square root of 89211281 is about 9445.1723647586. The cubic root of 89211281 is about 446.8275321547.

The spelling of 89211281 in words is "eighty-nine million, two hundred eleven thousand, two hundred eighty-one".