86781893 has 8 divisors (see below), whose sum is σ = 94739520. Its totient is φ = 78835680.

The previous prime is 86781887. The next prime is 86781899. The reversal of 86781893 is 39818768.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (86781887) and next prime (86781899).

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

It is not a de Polignac number, because 86781893 - 2²⁴ = 70004677 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 (86781899) 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, 24488 + ... + 27806.

It is an arithmetic number, because the mean of its divisors is an integer number (11842440).

Almost surely, 2^86781893 is an apocalyptic number.

It is an amenable number.

86781893 is a deficient number, since it is larger than the sum of its proper divisors (7957627).

86781893 is a wasteful number, since it uses less digits than its factorization.

86781893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5707.

The product of its digits is 580608, while the sum is 50.

The square root of 86781893 is about 9315.6799537125. The cubic root of 86781893 is about 442.7341678220.

The spelling of 86781893 in words is "eighty-six million, seven hundred eighty-one thousand, eight hundred ninety-three".