90711387 has 16 divisors (see below), whose sum is σ = 144725280. Its totient is φ = 55822176.

The previous prime is 90711359. The next prime is 90711389. The reversal of 90711387 is 78311709.

It is not a de Polignac number, because 90711387 - 2¹⁰ = 90710363 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (90711389) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 128868 + ... + 129569.

It is an arithmetic number, because the mean of its divisors is an integer number (9045330).

Almost surely, 2^90711387 is an apocalyptic number.

90711387 is a deficient number, since it is larger than the sum of its proper divisors (54013893).

90711387 is a wasteful number, since it uses less digits than its factorization.

90711387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258459 (or 258453 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The square root of 90711387 is about 9524.2525690996. The cubic root of 90711387 is about 449.3181228409.

The spelling of 90711387 in words is "ninety million, seven hundred eleven thousand, three hundred eighty-seven".