89771173 has 2 divisors, whose sum is σ = 89771174. Its totient is φ = 89771172.

The previous prime is 89771137. The next prime is 89771177. The reversal of 89771173 is 37117798.

Together with previous prime (89771137) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79156609 + 10614564 = 8897^2 + 3258^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89771173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89771177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44885586 + 44885587.

It is an arithmetic number, because the mean of its divisors is an integer number (44885587).

Almost surely, 2^89771173 is an apocalyptic number.

It is an amenable number.

89771173 is a deficient number, since it is larger than the sum of its proper divisors (1).

89771173 is an equidigital number, since it uses as much as digits as its factorization.

89771173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 74088, while the sum is 43.

The square root of 89771173 is about 9474.7650630504. The cubic root of 89771173 is about 447.7603499431.

The spelling of 89771173 in words is "eighty-nine million, seven hundred seventy-one thousand, one hundred seventy-three".