87423771 has 4 divisors (see below), whose sum is σ = 116565032. Its totient is φ = 58282512.

The previous prime is 87423757. The next prime is 87423793. The reversal of 87423771 is 17732478.

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

It is not a de Polignac number, because 87423771 - 2²⁶ = 20314907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87423071) 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 3 ways as a sum of consecutive naturals, for example, 14570626 + ... + 14570631.

It is an arithmetic number, because the mean of its divisors is an integer number (29141258).

Almost surely, 2^87423771 is an apocalyptic number.

87423771 is a deficient number, since it is larger than the sum of its proper divisors (29141261).

87423771 is a wasteful number, since it uses less digits than its factorization.

87423771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29141260.

The product of its digits is 65856, while the sum is 39.

The square root of 87423771 is about 9350.0679676674. The cubic root of 87423771 is about 443.8230414449.

The spelling of 87423771 in words is "eighty-seven million, four hundred twenty-three thousand, seven hundred seventy-one".