90660287 has 4 divisors (see below), whose sum is σ = 90877080. Its totient is φ = 90443496.

The previous prime is 90660281. The next prime is 90660299. The reversal of 90660287 is 78206609.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90660287 - 2¹⁰ = 90659263 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90660287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90660281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107768 + ... + 108605.

It is an arithmetic number, because the mean of its divisors is an integer number (22719270).

Almost surely, 2^90660287 is an apocalyptic number.

90660287 is a deficient number, since it is larger than the sum of its proper divisors (216793).

90660287 is a wasteful number, since it uses less digits than its factorization.

90660287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216792.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 90660287 is about 9521.5695659907. The cubic root of 90660287 is about 449.2337362696.

The spelling of 90660287 in words is "ninety million, six hundred sixty thousand, two hundred eighty-seven".