86639761 has 8 divisors (see below), whose sum is σ = 96314624. Its totient is φ = 77394960.

The previous prime is 86639747. The next prime is 86639821. The reversal of 86639761 is 16793668.

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 86639761 - 2⁹ = 86639249 is a prime.

It is a super-2 number, since 2×86639761² = 15012896372274242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86639731) 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, 107091 + ... + 107896.

It is an arithmetic number, because the mean of its divisors is an integer number (12039328).

Almost surely, 2^86639761 is an apocalyptic number.

It is an amenable number.

86639761 is a deficient number, since it is larger than the sum of its proper divisors (9674863).

86639761 is a wasteful number, since it uses less digits than its factorization.

86639761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215031.

The product of its digits is 326592, while the sum is 46.

The square root of 86639761 is about 9308.0481842328. The cubic root of 86639761 is about 442.4923313598.

The spelling of 86639761 in words is "eighty-six million, six hundred thirty-nine thousand, seven hundred sixty-one".