86806493 has 2 divisors, whose sum is σ = 86806494. Its totient is φ = 86806492.

The previous prime is 86806469. The next prime is 86806507. The reversal of 86806493 is 39460868.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86806489 + 4 = 9317^2 + 2^2 .

It is a cyclic number.

It is not a de Polignac number, because 86806493 - 2¹⁰ = 86805469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86808493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43403246 + 43403247.

It is an arithmetic number, because the mean of its divisors is an integer number (43403247).

Almost surely, 2^86806493 is an apocalyptic number.

It is an amenable number.

86806493 is a deficient number, since it is larger than the sum of its proper divisors (1).

86806493 is an equidigital number, since it uses as much as digits as its factorization.

86806493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 86806493 is about 9317.0002146614. Note that the first 3 decimals coincide. The cubic root of 86806493 is about 442.7759977137.

The spelling of 86806493 in words is "eighty-six million, eight hundred six thousand, four hundred ninety-three".