90206775 has 36 divisors (see below), whose sum is σ = 170082120. Its totient is φ = 45576000.

The previous prime is 90206749. The next prime is 90206827. The reversal of 90206775 is 57760209.

It is not a de Polignac number, because 90206775 - 2¹⁶ = 90141239 is a prime.

It is a congruent number.

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 35 ways as a sum of consecutive naturals, for example, 6276 + ... + 14825.

Almost surely, 2^90206775 is an apocalyptic number.

90206775 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

90206775 is a deficient number, since it is larger than the sum of its proper divisors (79875345).

90206775 is a wasteful number, since it uses less digits than its factorization.

90206775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21136 (or 21128 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 90206775 is about 9497.7247275334. The cubic root of 90206775 is about 448.4834130695.

The spelling of 90206775 in words is "ninety million, two hundred six thousand, seven hundred seventy-five".