90018745 has 4 divisors (see below), whose sum is σ = 108022500. Its totient is φ = 72014992.

The previous prime is 90018703. The next prime is 90018767. The reversal of 90018745 is 54781009.

It is a happy number.

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 59845696 + 30173049 = 7736^2 + 5493^2 .

It is a cyclic number.

It is not a de Polignac number, because 90018745 - 2¹¹ = 90016697 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90018745.

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, 9001870 + ... + 9001879.

It is an arithmetic number, because the mean of its divisors is an integer number (27005625).

Almost surely, 2^90018745 is an apocalyptic number.

It is an amenable number.

90018745 is a deficient number, since it is larger than the sum of its proper divisors (18003755).

90018745 is a wasteful number, since it uses less digits than its factorization.

90018745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18003754.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 90018745 is about 9487.8208773142. The cubic root of 90018745 is about 448.1715850633.

The spelling of 90018745 in words is "ninety million, eighteen thousand, seven hundred forty-five".