199547964 has 72 divisors (see below), whose sum is σ = 628887168. Its totient is φ = 51829920.

The previous prime is 199547963. The next prime is 199547969. The reversal of 199547964 is 469745991.

It is a happy number.

199547964 is a `hidden beast` number, since 1 + 9 + 9 + 547 + 96 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 199547964.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199547963) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33222 + ... + 38765.

It is an arithmetic number, because the mean of its divisors is an integer number (8734544).

Almost surely, 2^199547964 is an apocalyptic number.

199547964 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

199547964 is an abundant number, since it is smaller than the sum of its proper divisors (429339204).

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

199547964 is a wasteful number, since it uses less digits than its factorization.

199547964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72015 (or 72010 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The square root of 199547964 is about 14126.1446969794. The cubic root of 199547964 is about 584.3626281957.

The spelling of 199547964 in words is "one hundred ninety-nine million, five hundred forty-seven thousand, nine hundred sixty-four".