90250915 has 4 divisors (see below), whose sum is σ = 108301104. Its totient is φ = 72200728.

The previous prime is 90250913. The next prime is 90250921. The reversal of 90250915 is 51905209.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90250915 - 2¹ = 90250913 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90250913) 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 in 3 ways as a sum of consecutive naturals, for example, 9025087 + ... + 9025096.

It is an arithmetic number, because the mean of its divisors is an integer number (27075276).

Almost surely, 2^90250915 is an apocalyptic number.

90250915 is a deficient number, since it is larger than the sum of its proper divisors (18050189).

90250915 is a wasteful number, since it uses less digits than its factorization.

90250915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18050188.

The product of its (nonzero) digits is 4050, while the sum is 31.

The square root of 90250915 is about 9500.0481577727. The cubic root of 90250915 is about 448.5565518105.

The spelling of 90250915 in words is "ninety million, two hundred fifty thousand, nine hundred fifteen".