86708491 has 2 divisors, whose sum is σ = 86708492. Its totient is φ = 86708490.

The previous prime is 86708471. The next prime is 86708497. The reversal of 86708491 is 19480768.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86708491 - 2⁹ = 86707979 is a prime.

It is a super-2 number, since 2×86708491² = 15036724822994162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86708497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43354245 + 43354246.

It is an arithmetic number, because the mean of its divisors is an integer number (43354246).

Almost surely, 2^86708491 is an apocalyptic number.

86708491 is a deficient number, since it is larger than the sum of its proper divisors (1).

86708491 is an equidigital number, since it uses as much as digits as its factorization.

86708491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 86708491 is about 9311.7394186049. The cubic root of 86708491 is about 442.6093079042.

It can be divided in two parts, 8670 and 8491, that added together give a square (17161 = 131²).

The spelling of 86708491 in words is "eighty-six million, seven hundred eight thousand, four hundred ninety-one".