90250945 has 4 divisors (see below), whose sum is σ = 108301140. Its totient is φ = 72200752.

The previous prime is 90250921. The next prime is 90250973. The reversal of 90250945 is 54905209.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54905209 = 23 ⋅2387183.

It can be written as a sum of positive squares in 2 ways, for example, as 36096064 + 54154881 = 6008^2 + 7359^2 .

It is a cyclic number.

It is not a de Polignac number, because 90250945 - 2⁵ = 90250913 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90250945.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9025090 + ... + 9025099.

It is an arithmetic number, because the mean of its divisors is an integer number (27075285).

Almost surely, 2^90250945 is an apocalyptic number.

It is an amenable number.

90250945 is a deficient number, since it is larger than the sum of its proper divisors (18050195).

90250945 is a wasteful number, since it uses less digits than its factorization.

90250945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18050194.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 90250945 is about 9500.0497367119. The cubic root of 90250945 is about 448.5566015115.

The spelling of 90250945 in words is "ninety million, two hundred fifty thousand, nine hundred forty-five".