87684123 has 4 divisors (see below), whose sum is σ = 116912168. Its totient is φ = 58456080.

The previous prime is 87684071. The next prime is 87684127. The reversal of 87684123 is 32148678.

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

It is not a de Polignac number, because 87684123 - 2¹⁴ = 87667739 is a prime.

It is a super-4 number, since 4×87684123⁴ (a number of 33 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87684127) 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, 14614018 + ... + 14614023.

It is an arithmetic number, because the mean of its divisors is an integer number (29228042).

Almost surely, 2^87684123 is an apocalyptic number.

87684123 is a deficient number, since it is larger than the sum of its proper divisors (29228045).

87684123 is a wasteful number, since it uses less digits than its factorization.

87684123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29228044.

The product of its digits is 64512, while the sum is 39.

The square root of 87684123 is about 9363.9800832766. The cubic root of 87684123 is about 444.2631799410.

The spelling of 87684123 in words is "eighty-seven million, six hundred eighty-four thousand, one hundred twenty-three".