199160865 has 48 divisors (see below), whose sum is σ = 367303248. Its totient is φ = 99483648.

The previous prime is 199160861. The next prime is 199160867. The reversal of 199160865 is 568061991.

199160865 is nontrivially palindromic in base 14.

It can be written as a sum of positive squares in 8 ways, for example, as 266256 + 198894609 = 516^2 + 14103^2 .

It is not a de Polignac number, because 199160865 - 2² = 199160861 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 199160865.

It is not an unprimeable number, because it can be changed into a prime (199160861) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 196099 + ... + 197111.

It is an arithmetic number, because the mean of its divisors is an integer number (7652151).

Almost surely, 2^199160865 is an apocalyptic number.

199160865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

199160865 is a deficient number, since it is larger than the sum of its proper divisors (168142383).

199160865 is a wasteful number, since it uses less digits than its factorization.

199160865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298 (or 1295 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 199160865 is about 14112.4365366155. The cubic root of 199160865 is about 583.9845192384.

The spelling of 199160865 in words is "one hundred ninety-nine million, one hundred sixty thousand, eight hundred sixty-five".