86651647 has 8 divisors (see below), whose sum is σ = 91301760. Its totient is φ = 82010520.

The previous prime is 86651639. The next prime is 86651683. The reversal of 86651647 is 74615668.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 86651647 - 2³ = 86651639 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 (86651687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28398 + ... + 31300.

It is an arithmetic number, because the mean of its divisors is an integer number (11412720).

Almost surely, 2^86651647 is an apocalyptic number.

86651647 is a deficient number, since it is larger than the sum of its proper divisors (4650113).

86651647 is a wasteful number, since it uses less digits than its factorization.

86651647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4493.

The product of its digits is 241920, while the sum is 43.

The square root of 86651647 is about 9308.6866420564. The cubic root of 86651647 is about 442.5125654236.

The spelling of 86651647 in words is "eighty-six million, six hundred fifty-one thousand, six hundred forty-seven".