90209854 has 16 divisors (see below), whose sum is σ = 163742688. Its totient is φ = 36387072.

The previous prime is 90209813. The next prime is 90209897. The reversal of 90209854 is 45890209.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189279 + ... + 189754.

It is an arithmetic number, because the mean of its divisors is an integer number (10233918).

Almost surely, 2^90209854 is an apocalyptic number.

90209854 is a deficient number, since it is larger than the sum of its proper divisors (73532834).

90209854 is a wasteful number, since it uses less digits than its factorization.

90209854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379059.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 90209854 is about 9497.8868176032. The cubic root of 90209854 is about 448.4885156601.

The spelling of 90209854 in words is "ninety million, two hundred nine thousand, eight hundred fifty-four".