86393947 has 4 divisors (see below), whose sum is σ = 86670280. Its totient is φ = 86117616.

The previous prime is 86393933. The next prime is 86393963. The reversal of 86393947 is 74939368.

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-86393947 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86393947.

It is not an unprimeable number, because it can be changed into a prime (86393917) 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, 137697 + ... + 138322.

It is an arithmetic number, because the mean of its divisors is an integer number (21667570).

Almost surely, 2^86393947 is an apocalyptic number.

86393947 is a deficient number, since it is larger than the sum of its proper divisors (276333).

86393947 is a wasteful number, since it uses less digits than its factorization.

86393947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276332.

The product of its digits is 979776, while the sum is 49.

The square root of 86393947 is about 9294.8344256366. The cubic root of 86393947 is about 442.0734557797.

The spelling of 86393947 in words is "eighty-six million, three hundred ninety-three thousand, nine hundred forty-seven".