864099893 has 2 divisors, whose sum is σ = 864099894. Its totient is φ = 864099892.

The previous prime is 864099889. The next prime is 864099931. The reversal of 864099893 is 398990468.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 477072964 + 387026929 = 21842^2 + 19673^2 .

It is a cyclic number.

It is not a de Polignac number, because 864099893 - 2² = 864099889 is a prime.

It is a super-2 number, since 2×864099893² = 1493337250165222898, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (864099833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432049946 + 432049947.

It is an arithmetic number, because the mean of its divisors is an integer number (432049947).

Almost surely, 2^864099893 is an apocalyptic number.

It is an amenable number.

864099893 is a deficient number, since it is larger than the sum of its proper divisors (1).

864099893 is an equidigital number, since it uses as much as digits as its factorization.

864099893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3359232, while the sum is 56.

The square root of 864099893 is about 29395.5760787231. The cubic root of 864099893 is about 952.4773358435.

The spelling of 864099893 in words is "eight hundred sixty-four million, ninety-nine thousand, eight hundred ninety-three".