87999047 has 8 divisors (see below), whose sum is σ = 89237376. Its totient is φ = 86768632.

The previous prime is 87999029. The next prime is 87999053. The reversal of 87999047 is 74099978.

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 87999047 - 2⁸ = 87998791 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87999047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87999077) 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, 22478 + ... + 26100.

It is an arithmetic number, because the mean of its divisors is an integer number (11154672).

Almost surely, 2^87999047 is an apocalyptic number.

87999047 is a deficient number, since it is larger than the sum of its proper divisors (1238329).

87999047 is a wasteful number, since it uses less digits than its factorization.

87999047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3957.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The square root of 87999047 is about 9380.7807244387. The cubic root of 87999047 is about 444.7944124618.

The spelling of 87999047 in words is "eighty-seven million, nine hundred ninety-nine thousand, forty-seven".