90071775 has 36 divisors (see below), whose sum is σ = 163031232. Its totient is φ = 47531520.

The previous prime is 90071753. The next prime is 90071777. The reversal of 90071775 is 57717009.

It is not a de Polignac number, because 90071775 - 2⁹ = 90071263 is a prime.

It is a super-2 number, since 2×90071775² = 16225849303301250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90071777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 19762 + ... + 23888.

Almost surely, 2^90071775 is an apocalyptic number.

90071775 is a deficient number, since it is larger than the sum of its proper divisors (72959457).

90071775 is a wasteful number, since it uses less digits than its factorization.

90071775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4240 (or 4232 counting only the distinct ones).

The product of its (nonzero) digits is 15435, while the sum is 36.

The square root of 90071775 is about 9490.6151012461. The cubic root of 90071775 is about 448.2595736770.

The spelling of 90071775 in words is "ninety million, seventy-one thousand, seven hundred seventy-five".