609106991 has 8 divisors (see below), whose sum is σ = 645161760. Its totient is φ = 573077248.

The previous prime is 609106937. The next prime is 609107017. The reversal of 609106991 is 199601906.

609106991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 609106991 - 2¹⁴ = 609090607 is a prime.

It is a super-2 number, since 2×609106991² = 742022652970148162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609106591) 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, 71750 + ... + 79788.

It is an arithmetic number, because the mean of its divisors is an integer number (80645220).

Almost surely, 2^609106991 is an apocalyptic number.

609106991 is a deficient number, since it is larger than the sum of its proper divisors (36054769).

609106991 is a wasteful number, since it uses less digits than its factorization.

609106991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12513.

The product of its (nonzero) digits is 26244, while the sum is 41.

The square root of 609106991 is about 24680.0930103596. The cubic root of 609106991 is about 847.6785519037.

The spelling of 609106991 in words is "six hundred nine million, one hundred six thousand, nine hundred ninety-one".