864154199 has 2 divisors, whose sum is σ = 864154200. Its totient is φ = 864154198.

The previous prime is 864154189. The next prime is 864154201. The reversal of 864154199 is 991451468.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-864154199 is a prime.

It is a super-3 number, since 3×864154199³ (a number of 28 digits) contains 333 as substring.

It is a Sophie Germain prime.

Together with 864154201, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (864154189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432077099 + 432077100.

It is an arithmetic number, because the mean of its divisors is an integer number (432077100).

Almost surely, 2^864154199 is an apocalyptic number.

864154199 is a deficient number, since it is larger than the sum of its proper divisors (1).

864154199 is an equidigital number, since it uses as much as digits as its factorization.

864154199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 47.

The square root of 864154199 is about 29396.4997746330. The cubic root of 864154199 is about 952.4972888417.

The spelling of 864154199 in words is "eight hundred sixty-four million, one hundred fifty-four thousand, one hundred ninety-nine".