864197899 has 2 divisors, whose sum is σ = 864197900. Its totient is φ = 864197898.

The previous prime is 864197857. The next prime is 864197903. The reversal of 864197899 is 998791468.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 864197899 - 2¹¹ = 864195851 is a prime.

It is not a weakly prime, because it can be changed into another prime (864197849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432098949 + 432098950.

It is an arithmetic number, because the mean of its divisors is an integer number (432098950).

Almost surely, 2^864197899 is an apocalyptic number.

864197899 is a deficient number, since it is larger than the sum of its proper divisors (1).

864197899 is an equidigital number, since it uses as much as digits as its factorization.

864197899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7838208, while the sum is 61.

The square root of 864197899 is about 29397.2430510074. The cubic root of 864197899 is about 952.5133443983.

The spelling of 864197899 in words is "eight hundred sixty-four million, one hundred ninety-seven thousand, eight hundred ninety-nine".