86787983 has 2 divisors, whose sum is σ = 86787984. Its totient is φ = 86787982.

The previous prime is 86787973. The next prime is 86788001. The reversal of 86787983 is 38978768.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86787983 - 2²⁴ = 70010767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86787973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43393991 + 43393992.

It is an arithmetic number, because the mean of its divisors is an integer number (43393992).

Almost surely, 2^86787983 is an apocalyptic number.

86787983 is a deficient number, since it is larger than the sum of its proper divisors (1).

86787983 is an equidigital number, since it uses as much as digits as its factorization.

86787983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4064256, while the sum is 56.

The square root of 86787983 is about 9316.0068162276. The cubic root of 86787983 is about 442.7445240070.

It can be divided in two parts, 8678 and 7983, that added together give a palindrome (16661).

The spelling of 86787983 in words is "eighty-six million, seven hundred eighty-seven thousand, nine hundred eighty-three".