90530906 has 4 divisors (see below), whose sum is σ = 135796362. Its totient is φ = 45265452.

The previous prime is 90530903. The next prime is 90530917. The reversal of 90530906 is 60903509.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60903509 = 29 ⋅2100121.

It can be written as a sum of positive squares in only one way, i.e., 81739681 + 8791225 = 9041^2 + 2965^2 .

It is not an unprimeable number, because it can be changed into a prime (90530903) 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, 22632725 + ... + 22632728.

Almost surely, 2^90530906 is an apocalyptic number.

90530906 is a deficient number, since it is larger than the sum of its proper divisors (45265456).

90530906 is a wasteful number, since it uses less digits than its factorization.

90530906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45265455.

The product of its (nonzero) digits is 7290, while the sum is 32.

The square root of 90530906 is about 9514.7730398575. The cubic root of 90530906 is about 449.0199345319.

The spelling of 90530906 in words is "ninety million, five hundred thirty thousand, nine hundred six".