199208465 has 16 divisors (see below), whose sum is σ = 259003008. Its totient is φ = 146501376.

The previous prime is 199208447. The next prime is 199208467. The reversal of 199208465 is 564802991.

It is not a de Polignac number, because 199208465 - 2²⁰ = 198159889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199208467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23597 + ... + 30906.

It is an arithmetic number, because the mean of its divisors is an integer number (16187688).

Almost surely, 2^199208465 is an apocalyptic number.

It is an amenable number.

199208465 is a deficient number, since it is larger than the sum of its proper divisors (59794543).

199208465 is a wasteful number, since it uses less digits than its factorization.

199208465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54568.

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 199208465 is about 14114.1228916288. The cubic root of 199208465 is about 584.0310401732.

The spelling of 199208465 in words is "one hundred ninety-nine million, two hundred eight thousand, four hundred sixty-five".