87090427 has 4 divisors (see below), whose sum is σ = 87132096. Its totient is φ = 87048760.

The previous prime is 87090391. The next prime is 87090463. The reversal of 87090427 is 72409078.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (87090391) and next prime (87090463).

It is a cyclic number.

It is not a de Polignac number, because 87090427 - 2⁷ = 87090299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87090467) 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, 17524 + ... + 21937.

It is an arithmetic number, because the mean of its divisors is an integer number (21783024).

Almost surely, 2^87090427 is an apocalyptic number.

87090427 is a deficient number, since it is larger than the sum of its proper divisors (41669).

87090427 is a wasteful number, since it uses less digits than its factorization.

87090427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41668.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 87090427 is about 9332.2251901677. The cubic root of 87090427 is about 443.2582286828.

The spelling of 87090427 in words is "eighty-seven million, ninety thousand, four hundred twenty-seven".