86667947 has 4 divisors (see below), whose sum is σ = 86686800. Its totient is φ = 86649096.

The previous prime is 86667943. The next prime is 86668013. The reversal of 86667947 is 74976668.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 86667947 - 2² = 86667943 is a prime.

It is a super-2 number, since 2×86667947² = 15022666074389618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86667943) 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, 2498 + ... + 13400.

It is an arithmetic number, because the mean of its divisors is an integer number (21671700).

Almost surely, 2^86667947 is an apocalyptic number.

86667947 is a deficient number, since it is larger than the sum of its proper divisors (18853).

86667947 is a wasteful number, since it uses less digits than its factorization.

86667947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18852.

The product of its digits is 3048192, while the sum is 53.

The square root of 86667947 is about 9309.5621271894. The cubic root of 86667947 is about 442.5403106265.

The spelling of 86667947 in words is "eighty-six million, six hundred sixty-seven thousand, nine hundred forty-seven".