191007609 has 8 divisors (see below), whose sum is σ = 274267392. Its totient is φ = 117543120.

The previous prime is 191007599. The next prime is 191007611. The reversal of 191007609 is 906700191.

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

It is not a de Polignac number, because 191007609 - 2¹² = 191003513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 191007609.

It is not an unprimeable number, because it can be changed into a prime (191007809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2448777 + ... + 2448854.

It is an arithmetic number, because the mean of its divisors is an integer number (34283424).

Almost surely, 2^191007609 is an apocalyptic number.

It is an amenable number.

191007609 is a deficient number, since it is larger than the sum of its proper divisors (83259783).

191007609 is a wasteful number, since it uses less digits than its factorization.

191007609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4897647.

The product of its (nonzero) digits is 3402, while the sum is 33.

The square root of 191007609 is about 13820.5502423022. The cubic root of 191007609 is about 575.9041694113.

The spelling of 191007609 in words is "one hundred ninety-one million, seven thousand, six hundred nine".