90073 has 2 divisors, whose sum is σ = 90074. Its totient is φ = 90072.

The previous prime is 90071. The next prime is 90089. The reversal of 90073 is 37009.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63504 + 26569 = 252^2 + 163^2 .

It is a cyclic number.

It is not a de Polignac number, because 90073 - 2¹ = 90071 is a prime.

It is a super-2 number, since 2×90073² = 16226290658, which contains 22 as substring.

Together with 90071, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 90073.

It is not a weakly prime, because it can be changed into another prime (90071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45036 + 45037.

It is an arithmetic number, because the mean of its divisors is an integer number (45037).

2⁹⁰⁰⁷³ is an apocalyptic number.

It is an amenable number.

90073 is a deficient number, since it is larger than the sum of its proper divisors (1).

90073 is an equidigital number, since it uses as much as digits as its factorization.

90073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 189, while the sum is 19.

The square root of 90073 is about 300.1216420054. The cubic root of 90073 is about 44.8261605817.

The spelling of 90073 in words is "ninety thousand, seventy-three".