87133423 has 4 divisors (see below), whose sum is σ = 93836008. Its totient is φ = 80430840.

The previous prime is 87133399. The next prime is 87133439. The reversal of 87133423 is 32433178.

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 87133423 - 2²¹ = 85036271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87134423) 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, 3351273 + ... + 3351298.

It is an arithmetic number, because the mean of its divisors is an integer number (23459002).

Almost surely, 2^87133423 is an apocalyptic number.

87133423 is a deficient number, since it is larger than the sum of its proper divisors (6702585).

87133423 is a wasteful number, since it uses less digits than its factorization.

87133423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6702584.

The product of its digits is 12096, while the sum is 31.

The square root of 87133423 is about 9334.5285365679. The cubic root of 87133423 is about 443.3311612886.

The spelling of 87133423 in words is "eighty-seven million, one hundred thirty-three thousand, four hundred twenty-three".