83987 has 2 divisors, whose sum is σ = 83988. Its totient is φ = 83986.

The previous prime is 83983. The next prime is 84011. The reversal of 83987 is 78938.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 83987 - 2² = 83983 is a prime.

It is a Chen prime.

It is a plaindrome in base 6.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 83987.

It is not a weakly prime, because it can be changed into another prime (83983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41993 + 41994.

It is an arithmetic number, because the mean of its divisors is an integer number (41994).

2⁸³⁹⁸⁷ is an apocalyptic number.

83987 is a deficient number, since it is larger than the sum of its proper divisors (1).

83987 is an equidigital number, since it uses as much as digits as its factorization.

83987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 35.

The square root of 83987 is about 289.8051069253. The cubic root of 83987 is about 43.7929320066.

The spelling of 83987 in words is "eighty-three thousand, nine hundred eighty-seven".