87123487 has 8 divisors (see below), whose sum is σ = 100634832. Its totient is φ = 74544000.

The previous prime is 87123479. The next prime is 87123499. The reversal of 87123487 is 78432178.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87123487 - 2³ = 87123479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87123427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232764 + ... + 233137.

It is an arithmetic number, because the mean of its divisors is an integer number (12579354).

Almost surely, 2^87123487 is an apocalyptic number.

87123487 is a deficient number, since it is larger than the sum of its proper divisors (13511345).

87123487 is a wasteful number, since it uses less digits than its factorization.

87123487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465929.

The product of its digits is 75264, while the sum is 40.

The square root of 87123487 is about 9333.9963038347. The cubic root of 87123487 is about 443.3143093325.

The spelling of 87123487 in words is "eighty-seven million, one hundred twenty-three thousand, four hundred eighty-seven".