86981667 has 8 divisors (see below), whose sum is σ = 116062224. Its totient is φ = 57944448.

The previous prime is 86981597. The next prime is 86981689. The reversal of 86981667 is 76618968.

It is a happy number.

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

It is not a de Polignac number, because 86981667 - 2¹⁰ = 86980643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86981767) 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, 5818 + ... + 14415.

It is an arithmetic number, because the mean of its divisors is an integer number (14507778).

Almost surely, 2^86981667 is an apocalyptic number.

86981667 is a deficient number, since it is larger than the sum of its proper divisors (29080557).

86981667 is a wasteful number, since it uses less digits than its factorization.

86981667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21669.

The product of its digits is 870912, while the sum is 51.

The square root of 86981667 is about 9326.3962493559. The cubic root of 86981667 is about 443.0736356932.

The spelling of 86981667 in words is "eighty-six million, nine hundred eighty-one thousand, six hundred sixty-seven".