86406239 has 4 divisors (see below), whose sum is σ = 90163056. Its totient is φ = 82649424.

The previous prime is 86406233. The next prime is 86406253. The reversal of 86406239 is 93260468.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86406239 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 (86406233) 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, 1878374 + ... + 1878419.

It is an arithmetic number, because the mean of its divisors is an integer number (22540764).

Almost surely, 2^86406239 is an apocalyptic number.

86406239 is a deficient number, since it is larger than the sum of its proper divisors (3756817).

86406239 is a wasteful number, since it uses less digits than its factorization.

86406239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3756816.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 86406239 is about 9295.4956296047. The cubic root of 86406239 is about 442.0944206328.

The spelling of 86406239 in words is "eighty-six million, four hundred six thousand, two hundred thirty-nine".