86312993 has 8 divisors (see below), whose sum is σ = 93076200. Its totient is φ = 79567488.

The previous prime is 86312977. The next prime is 86313013. The reversal of 86312993 is 39921368.

It can be written as a sum of positive squares in 4 ways, for example, as 8025889 + 78287104 = 2833^2 + 8848^2 .

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

It is not a de Polignac number, because 86312993 - 2⁴ = 86312977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86312993.

It is not an unprimeable number, because it can be changed into a prime (86312393) 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, 6773 + ... + 14781.

It is an arithmetic number, because the mean of its divisors is an integer number (11634525).

Almost surely, 2^86312993 is an apocalyptic number.

It is an amenable number.

86312993 is a deficient number, since it is larger than the sum of its proper divisors (6763207).

86312993 is a wasteful number, since it uses less digits than its factorization.

86312993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8851.

The product of its digits is 69984, while the sum is 41.

The square root of 86312993 is about 9290.4786206094. The cubic root of 86312993 is about 441.9353334549.

The spelling of 86312993 in words is "eighty-six million, three hundred twelve thousand, nine hundred ninety-three".