90821706 has 16 divisors (see below), whose sum is σ = 181798464. Its totient is φ = 30248064.

The previous prime is 90821669. The next prime is 90821711. The reversal of 90821706 is 60712809.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 2010 + ... + 13626.

It is an arithmetic number, because the mean of its divisors is an integer number (11362404).

Almost surely, 2^90821706 is an apocalyptic number.

90821706 is an abundant number, since it is smaller than the sum of its proper divisors (90976758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90821706 is a wasteful number, since it uses less digits than its factorization.

90821706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12925.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 90821706 is about 9530.0422874193. The cubic root of 90821706 is about 449.5001957021.

The spelling of 90821706 in words is "ninety million, eight hundred twenty-one thousand, seven hundred six".