89442517 has 2 divisors, whose sum is σ = 89442518. Its totient is φ = 89442516.

The previous prime is 89442499. The next prime is 89442527. The reversal of 89442517 is 71524498.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52403121 + 37039396 = 7239^2 + 6086^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89442517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 89442517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89442527) 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, 44721258 + 44721259.

It is an arithmetic number, because the mean of its divisors is an integer number (44721259).

Almost surely, 2^89442517 is an apocalyptic number.

It is an amenable number.

89442517 is a deficient number, since it is larger than the sum of its proper divisors (1).

89442517 is an equidigital number, since it uses as much as digits as its factorization.

89442517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 40.

The square root of 89442517 is about 9457.4054052896. The cubic root of 89442517 is about 447.2132586664.

The spelling of 89442517 in words is "eighty-nine million, four hundred forty-two thousand, five hundred seventeen".