90755217 has 24 divisors (see below), whose sum is σ = 156334464. Its totient is φ = 49604544.

The previous prime is 90755183. The next prime is 90755227. The reversal of 90755217 is 71255709.

90755217 is a `hidden beast` number, since 90 + 7 + 552 + 17 = 666.

It is not a de Polignac number, because 90755217 - 2¹⁰ = 90754193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90755227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29868 + ... + 32765.

It is an arithmetic number, because the mean of its divisors is an integer number (6513936).

Almost surely, 2^90755217 is an apocalyptic number.

It is an amenable number.

90755217 is a deficient number, since it is larger than the sum of its proper divisors (65579247).

90755217 is a wasteful number, since it uses less digits than its factorization.

90755217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62669 (or 62666 counting only the distinct ones).

The product of its (nonzero) digits is 22050, while the sum is 36.

The square root of 90755217 is about 9526.5532591804. The cubic root of 90755217 is about 449.3904784843.

The spelling of 90755217 in words is "ninety million, seven hundred fifty-five thousand, two hundred seventeen".