86020309 has 4 divisors (see below), whose sum is σ = 87430540. Its totient is φ = 84610080.

The previous prime is 86020303. The next prime is 86020327. The reversal of 86020309 is 90302068.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33385284 + 52635025 = 5778^2 + 7255^2 .

It is a cyclic number.

It is not a de Polignac number, because 86020309 - 2¹³ = 86012117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86020303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 705024 + ... + 705145.

It is an arithmetic number, because the mean of its divisors is an integer number (21857635).

Almost surely, 2^86020309 is an apocalyptic number.

It is an amenable number.

86020309 is a deficient number, since it is larger than the sum of its proper divisors (1410231).

86020309 is a wasteful number, since it uses less digits than its factorization.

86020309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410230.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 86020309 is about 9274.7134187532. The cubic root of 86020309 is about 441.4352392563.

The spelling of 86020309 in words is "eighty-six million, twenty thousand, three hundred nine".