90250417 has 2 divisors, whose sum is σ = 90250418. Its totient is φ = 90250416.

The previous prime is 90250379. The next prime is 90250423. The reversal of 90250417 is 71405209.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55487601 + 34762816 = 7449^2 + 5896^2 .

It is a cyclic number.

It is not a de Polignac number, because 90250417 - 2¹¹ = 90248369 is a prime.

It is not a weakly prime, because it can be changed into another prime (90250487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45125208 + 45125209.

It is an arithmetic number, because the mean of its divisors is an integer number (45125209).

Almost surely, 2^90250417 is an apocalyptic number.

It is an amenable number.

90250417 is a deficient number, since it is larger than the sum of its proper divisors (1).

90250417 is an equidigital number, since it uses as much as digits as its factorization.

90250417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 90250417 is about 9500.0219473431. The cubic root of 90250417 is about 448.5557267715. Note that the first 3 decimals are identical.

The spelling of 90250417 in words is "ninety million, two hundred fifty thousand, four hundred seventeen".