90459973 has 2 divisors, whose sum is σ = 90459974. Its totient is φ = 90459972.

The previous prime is 90459937. The next prime is 90460033. The reversal of 90459973 is 37995409.

Together with previous prime (90459937) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86992929 + 3467044 = 9327^2 + 1862^2 .

It is a cyclic number.

It is not a de Polignac number, because 90459973 - 2⁹ = 90459461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90459073) 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, 45229986 + 45229987.

It is an arithmetic number, because the mean of its divisors is an integer number (45229987).

Almost surely, 2^90459973 is an apocalyptic number.

It is an amenable number.

90459973 is a deficient number, since it is larger than the sum of its proper divisors (1).

90459973 is an equidigital number, since it uses as much as digits as its factorization.

90459973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 306180, while the sum is 46.

The square root of 90459973 is about 9511.0447901374. The cubic root of 90459973 is about 448.9026314858.

The spelling of 90459973 in words is "ninety million, four hundred fifty-nine thousand, nine hundred seventy-three".