199713564 has 18 divisors (see below), whose sum is σ = 504831600. Its totient is φ = 66571176.

The previous prime is 199713551. The next prime is 199713571. The reversal of 199713564 is 465317991.

199713564 is a `hidden beast` number, since 19 + 9 + 71 + 3 + 564 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2773764 + ... + 2773835.

It is an arithmetic number, because the mean of its divisors is an integer number (28046200).

Almost surely, 2^199713564 is an apocalyptic number.

It is an amenable number.

199713564 is an abundant number, since it is smaller than the sum of its proper divisors (305118036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199713564 is a wasteful number, since it uses less digits than its factorization.

199713564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5547609 (or 5547604 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 199713564 is about 14132.0049532966. The cubic root of 199713564 is about 584.5242329422.

The spelling of 199713564 in words is "one hundred ninety-nine million, seven hundred thirteen thousand, five hundred sixty-four".