86675981 has 8 divisors (see below), whose sum is σ = 99114624. Its totient is φ = 74251440.

The previous prime is 86675971. The next prime is 86675989. The reversal of 86675981 is 18957668.

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 86675981 - 2¹⁰ = 86674957 is a prime.

It is a super-2 number, since 2×86675981² = 15025451364624722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86675989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21776 + ... + 25446.

It is an arithmetic number, because the mean of its divisors is an integer number (12389328).

Almost surely, 2^86675981 is an apocalyptic number.

It is an amenable number.

86675981 is a deficient number, since it is larger than the sum of its proper divisors (12438643).

86675981 is a wasteful number, since it uses less digits than its factorization.

86675981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7051.

The product of its digits is 725760, while the sum is 50.

The square root of 86675981 is about 9309.9936090204. The cubic root of 86675981 is about 442.5539844976.

The spelling of 86675981 in words is "eighty-six million, six hundred seventy-five thousand, nine hundred eighty-one".