89217871 has 2 divisors, whose sum is σ = 89217872. Its totient is φ = 89217870.

The previous prime is 89217857. The next prime is 89217883. The reversal of 89217871 is 17871298.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 89217871 - 2⁷ = 89217743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89217811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44608935 + 44608936.

It is an arithmetic number, because the mean of its divisors is an integer number (44608936).

Almost surely, 2^89217871 is an apocalyptic number.

89217871 is a deficient number, since it is larger than the sum of its proper divisors (1).

89217871 is an equidigital number, since it uses as much as digits as its factorization.

89217871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 43.

The square root of 89217871 is about 9445.5212137817. The cubic root of 89217871 is about 446.8385342047.

The spelling of 89217871 in words is "eighty-nine million, two hundred seventeen thousand, eight hundred seventy-one".