86730709 has 4 divisors (see below), whose sum is σ = 93402316. Its totient is φ = 80059104.

The previous prime is 86730667. The next prime is 86730779. The reversal of 86730709 is 90703768.

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 15800625 + 70930084 = 3975^2 + 8422^2 .

It is a cyclic number.

It is not a de Polignac number, because 86730709 - 2¹¹ = 86728661 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 (86730779) 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, 3335784 + ... + 3335809.

It is an arithmetic number, because the mean of its divisors is an integer number (23350579).

Almost surely, 2^86730709 is an apocalyptic number.

It is an amenable number.

86730709 is a deficient number, since it is larger than the sum of its proper divisors (6671607).

86730709 is a wasteful number, since it uses less digits than its factorization.

86730709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6671606.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 86730709 is about 9312.9323523797. The cubic root of 86730709 is about 442.6471090994.

The spelling of 86730709 in words is "eighty-six million, seven hundred thirty thousand, seven hundred nine".