89211811 has 4 divisors (see below), whose sum is σ = 96074272. Its totient is φ = 82349352.

The previous prime is 89211791. The next prime is 89211827. The reversal of 89211811 is 11811298.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 89211811 - 2⁹ = 89211299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89211851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3431211 + ... + 3431236.

It is an arithmetic number, because the mean of its divisors is an integer number (24018568).

Almost surely, 2^89211811 is an apocalyptic number.

89211811 is a deficient number, since it is larger than the sum of its proper divisors (6862461).

89211811 is a wasteful number, since it uses less digits than its factorization.

89211811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6862460.

The product of its digits is 1152, while the sum is 31.

The square root of 89211811 is about 9445.2004213780. The cubic root of 89211811 is about 446.8284170133.

The spelling of 89211811 in words is "eighty-nine million, two hundred eleven thousand, eight hundred eleven".