86268781 has 4 divisors (see below), whose sum is σ = 86296864. Its totient is φ = 86240700.

The previous prime is 86268773. The next prime is 86268799. The reversal of 86268781 is 18786268.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86268781 - 2³ = 86268773 is a prime.

It is a super-2 number, since 2×86268781² = 14884605150451922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86268181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8775 + ... + 15796.

It is an arithmetic number, because the mean of its divisors is an integer number (21574216).

Almost surely, 2^86268781 is an apocalyptic number.

It is an amenable number.

86268781 is a deficient number, since it is larger than the sum of its proper divisors (28083).

86268781 is a wasteful number, since it uses less digits than its factorization.

86268781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28082.

The product of its digits is 258048, while the sum is 46.

The square root of 86268781 is about 9288.0988905158. The cubic root of 86268781 is about 441.8598632337.

The spelling of 86268781 in words is "eighty-six million, two hundred sixty-eight thousand, seven hundred eighty-one".