9090538 has 4 divisors (see below), whose sum is σ = 13635810. Its totient is φ = 4545268.

The previous prime is 9090527. The next prime is 9090539. The reversal of 9090538 is 8350909.

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

It can be written as a sum of positive squares in only one way, i.e., 5968249 + 3122289 = 2443^2 + 1767^2 .

It is a super-2 number, since 2×9090538² = 165275762258888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9090539) 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 as a sum of consecutive naturals, namely, 2272633 + ... + 2272636.

Almost surely, 2^9090538 is an apocalyptic number.

9090538 is a deficient number, since it is larger than the sum of its proper divisors (4545272).

9090538 is a wasteful number, since it uses less digits than its factorization.

9090538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4545271.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 9090538 is about 3015.0519066842. The cubic root of 9090538 is about 208.7035624052.

The spelling of 9090538 in words is "nine million, ninety thousand, five hundred thirty-eight".