87317143 has 2 divisors, whose sum is σ = 87317144. Its totient is φ = 87317142.

The previous prime is 87317137. The next prime is 87317161. The reversal of 87317143 is 34171378.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87317143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87317099 and 87317108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87317183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43658571 + 43658572.

It is an arithmetic number, because the mean of its divisors is an integer number (43658572).

Almost surely, 2^87317143 is an apocalyptic number.

87317143 is a deficient number, since it is larger than the sum of its proper divisors (1).

87317143 is an equidigital number, since it uses as much as digits as its factorization.

87317143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 34.

The square root of 87317143 is about 9344.3642373358. The cubic root of 87317143 is about 443.6425290754.

The spelling of 87317143 in words is "eighty-seven million, three hundred seventeen thousand, one hundred forty-three".