199466993 has 4 divisors (see below), whose sum is σ = 217600368. Its totient is φ = 181333620.

The previous prime is 199466987. The next prime is 199466999. The reversal of 199466993 is 399664991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 399664991 = 11 ⋅36333181.

It is an interprime number because it is at equal distance from previous prime (199466987) and next prime (199466999).

It is a cyclic number.

It is not a de Polignac number, because 199466993 - 2⁴ = 199466977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199466999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9066671 + ... + 9066692.

It is an arithmetic number, because the mean of its divisors is an integer number (54400092).

Almost surely, 2^199466993 is an apocalyptic number.

It is an amenable number.

199466993 is a deficient number, since it is larger than the sum of its proper divisors (18133375).

199466993 is a wasteful number, since it uses less digits than its factorization.

199466993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18133374.

The product of its digits is 2834352, while the sum is 56.

The square root of 199466993 is about 14123.2784083583. The cubic root of 199466993 is about 584.2835781488.

The spelling of 199466993 in words is "one hundred ninety-nine million, four hundred sixty-six thousand, nine hundred ninety-three".