90250093 has 4 divisors (see below), whose sum is σ = 95558940. Its totient is φ = 84941248.

The previous prime is 90250079. The next prime is 90250109. The reversal of 90250093 is 39005209.

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

It can be written as a sum of positive squares in 2 ways, for example, as 44916804 + 45333289 = 6702^2 + 6733^2 .

It is not a de Polignac number, because 90250093 - 2²¹ = 88152941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90250063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2654398 + ... + 2654431.

It is an arithmetic number, because the mean of its divisors is an integer number (23889735).

Almost surely, 2^90250093 is an apocalyptic number.

It is an amenable number.

90250093 is a deficient number, since it is larger than the sum of its proper divisors (5308847).

90250093 is a wasteful number, since it uses less digits than its factorization.

90250093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5308846.

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 90250093 is about 9500.0048947356. The cubic root of 90250093 is about 448.5551899975. Note that the first 3 decimals are identical.

The spelling of 90250093 in words is "ninety million, two hundred fifty thousand, ninety-three".