90134990 has 16 divisors (see below), whose sum is σ = 176992560. Its totient is φ = 32776320.

The previous prime is 90134977. The next prime is 90135007. The reversal of 90134990 is 9943109.

It is a self number, because there is not a number n which added to its sum of digits gives 90134990.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 409595 + ... + 409814.

It is an arithmetic number, because the mean of its divisors is an integer number (11062035).

Almost surely, 2^90134990 is an apocalyptic number.

90134990 is a deficient number, since it is larger than the sum of its proper divisors (86857570).

90134990 is a wasteful number, since it uses less digits than its factorization.

90134990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819427.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 90134990 is about 9493.9449124165. The cubic root of 90134990 is about 448.3644163700.

The spelling of 90134990 in words is "ninety million, one hundred thirty-four thousand, nine hundred ninety".