90813550 has 12 divisors (see below), whose sum is σ = 168913296. Its totient is φ = 36325400.

The previous prime is 90813497. The next prime is 90813551. The reversal of 90813550 is 5531809.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90813551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 908086 + ... + 908185.

It is an arithmetic number, because the mean of its divisors is an integer number (14076108).

Almost surely, 2^90813550 is an apocalyptic number.

90813550 is a deficient number, since it is larger than the sum of its proper divisors (78099746).

90813550 is a wasteful number, since it uses less digits than its factorization.

90813550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1816283 (or 1816278 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 90813550 is about 9529.6143678535. The cubic root of 90813550 is about 449.4867399123.

The spelling of 90813550 in words is "ninety million, eight hundred thirteen thousand, five hundred fifty".