866500093 has 2 divisors, whose sum is σ = 866500094. Its totient is φ = 866500092.

The previous prime is 866500069. The next prime is 866500097. The reversal of 866500093 is 390005668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 864183609 + 2316484 = 29397^2 + 1522^2 .

It is a cyclic number.

It is not a de Polignac number, because 866500093 - 2²¹ = 864402941 is a prime.

It is a super-2 number, since 2×866500093² = 1501644822338017298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866500097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433250046 + 433250047.

It is an arithmetic number, because the mean of its divisors is an integer number (433250047).

Almost surely, 2^866500093 is an apocalyptic number.

It is an amenable number.

866500093 is a deficient number, since it is larger than the sum of its proper divisors (1).

866500093 is an equidigital number, since it uses as much as digits as its factorization.

866500093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 866500093 is about 29436.3736387484. The cubic root of 866500093 is about 953.3584155490.

The spelling of 866500093 in words is "eight hundred sixty-six million, five hundred thousand, ninety-three".