86710989 has 8 divisors (see below), whose sum is σ = 120641472. Its totient is φ = 55293920.

The previous prime is 86710979. The next prime is 86710993. The reversal of 86710989 is 98901768.

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 86710989 - 2⁴ = 86710973 is a prime.

It is a super-2 number, since 2×86710989² = 15037591226716242, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86710979) 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, 628272 + ... + 628409.

It is an arithmetic number, because the mean of its divisors is an integer number (15080184).

Almost surely, 2^86710989 is an apocalyptic number.

It is an amenable number.

86710989 is a deficient number, since it is larger than the sum of its proper divisors (33930483).

86710989 is a wasteful number, since it uses less digits than its factorization.

86710989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256707.

The product of its (nonzero) digits is 217728, while the sum is 48.

The square root of 86710989 is about 9311.8735493992. The cubic root of 86710989 is about 442.6135582662.

The spelling of 86710989 in words is "eighty-six million, seven hundred ten thousand, nine hundred eighty-nine".