89021447 has 2 divisors, whose sum is σ = 89021448. Its totient is φ = 89021446.

The previous prime is 89021437. The next prime is 89021453. The reversal of 89021447 is 74412098.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 89021447 - 2¹² = 89017351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89021407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44510723 + 44510724.

It is an arithmetic number, because the mean of its divisors is an integer number (44510724).

Almost surely, 2^89021447 is an apocalyptic number.

89021447 is a deficient number, since it is larger than the sum of its proper divisors (1).

89021447 is an equidigital number, since it uses as much as digits as its factorization.

89021447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 89021447 is about 9435.1177523124. The cubic root of 89021447 is about 446.5103701193.

The spelling of 89021447 in words is "eighty-nine million, twenty-one thousand, four hundred forty-seven".