199564 has 6 divisors (see below), whose sum is σ = 349244. Its totient is φ = 99780.

The previous prime is 199559. The next prime is 199567. The reversal of 199564 is 465991.

It is a plaindrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (199567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24942 + ... + 24949.

2¹⁹⁹⁵⁶⁴ is an apocalyptic number.

It is an amenable number.

199564 is a deficient number, since it is larger than the sum of its proper divisors (149680).

199564 is a wasteful number, since it uses less digits than its factorization.

199564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49895 (or 49893 counting only the distinct ones).

The product of its digits is 9720, while the sum is 34.

The square root of 199564 is about 446.7258667237. The cubic root of 199564 is about 58.4378281221.

The spelling of 199564 in words is "one hundred ninety-nine thousand, five hundred sixty-four".