90250073 has 2 divisors, whose sum is σ = 90250074. Its totient is φ = 90250072.

The previous prime is 90250063. The next prime is 90250079. The reversal of 90250073 is 37005209.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77915929 + 12334144 = 8827^2 + 3512^2 .

It is a cyclic number.

It is not a de Polignac number, because 90250073 - 2⁶ = 90250009 is a prime.

It is not a weakly prime, because it can be changed into another prime (90250079) 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, 45125036 + 45125037.

It is an arithmetic number, because the mean of its divisors is an integer number (45125037).

Almost surely, 2^90250073 is an apocalyptic number.

It is an amenable number.

90250073 is a deficient number, since it is larger than the sum of its proper divisors (1).

90250073 is an equidigital number, since it uses as much as digits as its factorization.

90250073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1890, while the sum is 26.

The square root of 90250073 is about 9500.0038421045. The cubic root of 90250073 is about 448.5551568633. Note that the first 3 decimals are identical.

The spelling of 90250073 in words is "ninety million, two hundred fifty thousand, seventy-three".