87317943 has 4 divisors (see below), whose sum is σ = 116423928. Its totient is φ = 58211960.

The previous prime is 87317921. The next prime is 87317953. The reversal of 87317943 is 34971378.

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 87317943 - 2⁵ = 87317911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87317895 and 87317904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87317903) 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, 14552988 + ... + 14552993.

It is an arithmetic number, because the mean of its divisors is an integer number (29105982).

Almost surely, 2^87317943 is an apocalyptic number.

87317943 is a deficient number, since it is larger than the sum of its proper divisors (29105985).

87317943 is a wasteful number, since it uses less digits than its factorization.

87317943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29105984.

The product of its digits is 127008, while the sum is 42.

The square root of 87317943 is about 9344.4070437883. The cubic root of 87317943 is about 443.6438839561.

The spelling of 87317943 in words is "eighty-seven million, three hundred seventeen thousand, nine hundred forty-three".