90170573 has 2 divisors, whose sum is σ = 90170574. Its totient is φ = 90170572.

The previous prime is 90170569. The next prime is 90170579. The reversal of 90170573 is 37507109.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84400969 + 5769604 = 9187^2 + 2402^2 .

It is an emirp because it is prime and its reverse (37507109) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90170573 - 2² = 90170569 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90170579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45085286 + 45085287.

It is an arithmetic number, because the mean of its divisors is an integer number (45085287).

Almost surely, 2^90170573 is an apocalyptic number.

It is an amenable number.

90170573 is a deficient number, since it is larger than the sum of its proper divisors (1).

90170573 is an equidigital number, since it uses as much as digits as its factorization.

90170573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6615, while the sum is 32.

The square root of 90170573 is about 9495.8187114119. The cubic root of 90170573 is about 448.4234095610.

The spelling of 90170573 in words is "ninety million, one hundred seventy thousand, five hundred seventy-three".