87824071 has 4 divisors (see below), whose sum is σ = 88279312. Its totient is φ = 87368832.

The previous prime is 87824053. The next prime is 87824101. The reversal of 87824071 is 17042878.

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 87824071 - 2⁵ = 87824039 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 87824071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87824041) 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, 227331 + ... + 227716.

It is an arithmetic number, because the mean of its divisors is an integer number (22069828).

Almost surely, 2^87824071 is an apocalyptic number.

87824071 is a deficient number, since it is larger than the sum of its proper divisors (455241).

87824071 is a wasteful number, since it uses less digits than its factorization.

87824071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455240.

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 87824071 is about 9371.4497811171. The cubic root of 87824071 is about 444.4994093110.

The spelling of 87824071 in words is "eighty-seven million, eight hundred twenty-four thousand, seventy-one".