864099919 has 8 divisors (see below), whose sum is σ = 917557200. Its totient is φ = 810934656.

The previous prime is 864099893. The next prime is 864099931. The reversal of 864099919 is 919990468.

864099919 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 864099919 - 2²⁷ = 729882191 is a prime.

It is a super-2 number, since 2×864099919² = 1493337340031613122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 864099919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864099419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66889 + ... + 78754.

It is an arithmetic number, because the mean of its divisors is an integer number (114694650).

Almost surely, 2^864099919 is an apocalyptic number.

864099919 is a deficient number, since it is larger than the sum of its proper divisors (53457281).

864099919 is a wasteful number, since it uses less digits than its factorization.

864099919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146009.

The product of its (nonzero) digits is 1259712, while the sum is 55.

The square root of 864099919 is about 29395.5765209666. The cubic root of 864099919 is about 952.4773453966.

The spelling of 864099919 in words is "eight hundred sixty-four million, ninety-nine thousand, nine hundred nineteen".