90727775 has 6 divisors (see below), whose sum is σ = 112502472. Its totient is φ = 72582200.

The previous prime is 90727771. The next prime is 90727799. The reversal of 90727775 is 57772709.

It is not a de Polignac number, because 90727775 - 2² = 90727771 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90727771) 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, 1814531 + ... + 1814580.

It is an arithmetic number, because the mean of its divisors is an integer number (18750412).

Almost surely, 2^90727775 is an apocalyptic number.

90727775 is a deficient number, since it is larger than the sum of its proper divisors (21774697).

90727775 is a wasteful number, since it uses less digits than its factorization.

90727775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3629121 (or 3629116 counting only the distinct ones).

The product of its (nonzero) digits is 216090, while the sum is 44.

The square root of 90727775 is about 9525.1128602238. The cubic root of 90727775 is about 449.3451792824.

It can be divided in two parts, 907 and 27775, that added together give a palindrome (28682).

The spelling of 90727775 in words is "ninety million, seven hundred twenty-seven thousand, seven hundred seventy-five".