86864539 has 2 divisors, whose sum is σ = 86864540. Its totient is φ = 86864538.

The previous prime is 86864473. The next prime is 86864551. The reversal of 86864539 is 93546868.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86864539 - 2¹⁹ = 86340251 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 86864492 and 86864501.

It is not a weakly prime, because it can be changed into another prime (86864839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43432269 + 43432270.

It is an arithmetic number, because the mean of its divisors is an integer number (43432270).

Almost surely, 2^86864539 is an apocalyptic number.

86864539 is a deficient number, since it is larger than the sum of its proper divisors (1).

86864539 is an equidigital number, since it uses as much as digits as its factorization.

86864539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1244160, while the sum is 49.

The square root of 86864539 is about 9320.1147525124. The cubic root of 86864539 is about 442.8746679403.

It can be divided in two parts, 8686 and 4539, that added together give a square (13225 = 115²).

The spelling of 86864539 in words is "eighty-six million, eight hundred sixty-four thousand, five hundred thirty-nine".