86929809 has 4 divisors (see below), whose sum is σ = 115906416. Its totient is φ = 57953204.

The previous prime is 86929741. The next prime is 86929831. The reversal of 86929809 is 90892968.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86929809 - 2¹⁶ = 86864273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86929889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14488299 + ... + 14488304.

It is an arithmetic number, because the mean of its divisors is an integer number (28976604).

Almost surely, 2^86929809 is an apocalyptic number.

It is an amenable number.

86929809 is a deficient number, since it is larger than the sum of its proper divisors (28976607).

86929809 is a wasteful number, since it uses less digits than its factorization.

86929809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28976606.

The product of its (nonzero) digits is 559872, while the sum is 51.

The square root of 86929809 is about 9323.6156613194. The cubic root of 86929809 is about 442.9855654859.

The spelling of 86929809 in words is "eighty-six million, nine hundred twenty-nine thousand, eight hundred nine".