86804539 has 2 divisors, whose sum is σ = 86804540. Its totient is φ = 86804538.

The previous prime is 86804537. The next prime is 86804563. The reversal of 86804539 is 93540868.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86804539 - 2¹ = 86804537 is a prime.

It is a super-3 number, since 3×86804539³ (a number of 25 digits) contains 333 as substring.

Together with 86804537, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 86804495 and 86804504.

It is not a weakly prime, because it can be changed into another prime (86804537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43402269 + 43402270.

It is an arithmetic number, because the mean of its divisors is an integer number (43402270).

Almost surely, 2^86804539 is an apocalyptic number.

86804539 is a deficient number, since it is larger than the sum of its proper divisors (1).

86804539 is an equidigital number, since it uses as much as digits as its factorization.

86804539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 86804539 is about 9316.8953519936. The cubic root of 86804539 is about 442.7726754170.

The spelling of 86804539 in words is "eighty-six million, eight hundred four thousand, five hundred thirty-nine".