86399787 has 16 divisors (see below), whose sum is σ = 119412000. Its totient is φ = 55501824.

The previous prime is 86399767. The next prime is 86399791. The reversal of 86399787 is 78799368.

It is not a de Polignac number, because 86399787 - 2¹⁹ = 85875499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86399717) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80289 + ... + 81357.

It is an arithmetic number, because the mean of its divisors is an integer number (7463250).

Almost surely, 2^86399787 is an apocalyptic number.

86399787 is a gapful number since it is divisible by the number (87) formed by its first and last digit.

86399787 is a deficient number, since it is larger than the sum of its proper divisors (33012213).

86399787 is a wasteful number, since it uses less digits than its factorization.

86399787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2030.

The product of its digits is 4572288, while the sum is 57.

The square root of 86399787 is about 9295.1485733150. The cubic root of 86399787 is about 442.0834165501.

The spelling of 86399787 in words is "eighty-six million, three hundred ninety-nine thousand, seven hundred eighty-seven".