199630691 has 8 divisors (see below), whose sum is σ = 217932960. Its totient is φ = 181749312.

The previous prime is 199630657. The next prime is 199630699. The reversal of 199630691 is 196036991.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199630691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199630699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104231 + ... + 106128.

It is an arithmetic number, because the mean of its divisors is an integer number (27241620).

Almost surely, 2^199630691 is an apocalyptic number.

199630691 is a deficient number, since it is larger than the sum of its proper divisors (18302269).

199630691 is a wasteful number, since it uses less digits than its factorization.

199630691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210445.

The product of its (nonzero) digits is 78732, while the sum is 44.

The square root of 199630691 is about 14129.0725456415. The cubic root of 199630691 is about 584.4433705015.

The spelling of 199630691 in words is "one hundred ninety-nine million, six hundred thirty thousand, six hundred ninety-one".