199720004 has 12 divisors (see below), whose sum is σ = 381283728. Its totient is φ = 90781800.

The previous prime is 199719997. The next prime is 199720009. The reversal of 199720004 is 400027991.

It is not an unprimeable number, because it can be changed into a prime (199720009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2269502 + ... + 2269589.

It is an arithmetic number, because the mean of its divisors is an integer number (31773644).

Almost surely, 2^199720004 is an apocalyptic number.

It is an amenable number.

199720004 is a deficient number, since it is larger than the sum of its proper divisors (181563724).

199720004 is a wasteful number, since it uses less digits than its factorization.

199720004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4539106 (or 4539104 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 199720004 is about 14132.2328030641. The cubic root of 199720004 is about 584.5305157663.

Adding to 199720004 its reverse (400027991), we get a palindrome (599747995).

The spelling of 199720004 in words is "one hundred ninety-nine million, seven hundred twenty thousand, four".