87684573 has 4 divisors (see below), whose sum is σ = 116912768. Its totient is φ = 58456380.

The previous prime is 87684551. The next prime is 87684587. The reversal of 87684573 is 37548678.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 87684573 - 2¹⁸ = 87422429 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 (87684593) 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, 14614093 + ... + 14614098.

It is an arithmetic number, because the mean of its divisors is an integer number (29228192).

Almost surely, 2^87684573 is an apocalyptic number.

It is an amenable number.

87684573 is a deficient number, since it is larger than the sum of its proper divisors (29228195).

87684573 is a wasteful number, since it uses less digits than its factorization.

87684573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29228194.

The product of its digits is 1128960, while the sum is 48.

The square root of 87684573 is about 9364.0041114899. The cubic root of 87684573 is about 444.2639399345.

The spelling of 87684573 in words is "eighty-seven million, six hundred eighty-four thousand, five hundred seventy-three".