86807993 has 2 divisors, whose sum is σ = 86807994. Its totient is φ = 86807992.

The previous prime is 86807951. The next prime is 86808037. The reversal of 86807993 is 39970868.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74787904 + 12020089 = 8648^2 + 3467^2 .

It is a cyclic number.

It is not a de Polignac number, because 86807993 - 2⁸ = 86807737 is a prime.

It is not a weakly prime, because it can be changed into another prime (86807093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43403996 + 43403997.

It is an arithmetic number, because the mean of its divisors is an integer number (43403997).

Almost surely, 2^86807993 is an apocalyptic number.

It is an amenable number.

86807993 is a deficient number, since it is larger than the sum of its proper divisors (1).

86807993 is an equidigital number, since it uses as much as digits as its factorization.

86807993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 86807993 is about 9317.0807123262. The cubic root of 86807993 is about 442.7785480613.

The spelling of 86807993 in words is "eighty-six million, eight hundred seven thousand, nine hundred ninety-three".