90095987 has 4 divisors (see below), whose sum is σ = 90129696. Its totient is φ = 90062280.

The previous prime is 90095977. The next prime is 90095989. The reversal of 90095987 is 78959009.

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 90095987 - 2⁶ = 90095923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90095989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12464 + ... + 18317.

It is an arithmetic number, because the mean of its divisors is an integer number (22532424).

Almost surely, 2^90095987 is an apocalyptic number.

90095987 is a deficient number, since it is larger than the sum of its proper divisors (33709).

90095987 is a wasteful number, since it uses less digits than its factorization.

90095987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33708.

The product of its (nonzero) digits is 204120, while the sum is 47.

The square root of 90095987 is about 9491.8905914470. The cubic root of 90095987 is about 448.2997353091.

The spelling of 90095987 in words is "ninety million, ninety-five thousand, nine hundred eighty-seven".