90549905 has 16 divisors (see below), whose sum is σ = 115758720. Its totient is φ = 67759872.

The previous prime is 90549887. The next prime is 90549911. The reversal of 90549905 is 50994509.

It is a cyclic number.

It is not a de Polignac number, because 90549905 - 2¹⁰ = 90548881 is a prime.

It is a super-3 number, since 3×90549905³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11006 + ... + 17384.

It is an arithmetic number, because the mean of its divisors is an integer number (7234920).

Almost surely, 2^90549905 is an apocalyptic number.

It is an amenable number.

90549905 is a deficient number, since it is larger than the sum of its proper divisors (25208815).

90549905 is a wasteful number, since it uses less digits than its factorization.

90549905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6568.

The product of its (nonzero) digits is 72900, while the sum is 41.

The square root of 90549905 is about 9515.7713822895. The cubic root of 90549905 is about 449.0513430803.

The spelling of 90549905 in words is "ninety million, five hundred forty-nine thousand, nine hundred five".