609009961 has 8 divisors (see below), whose sum is σ = 701325504. Its totient is φ = 518022960.

The previous prime is 609009953. The next prime is 609009971. The reversal of 609009961 is 169900906.

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

It is not a de Polignac number, because 609009961 - 2³ = 609009953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (609009931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331150 + ... + 332983.

It is an arithmetic number, because the mean of its divisors is an integer number (87665688).

Almost surely, 2^609009961 is an apocalyptic number.

It is an amenable number.

609009961 is a deficient number, since it is larger than the sum of its proper divisors (92315543).

609009961 is a wasteful number, since it uses less digits than its factorization.

609009961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664271.

The product of its (nonzero) digits is 26244, while the sum is 40.

The square root of 609009961 is about 24678.1271777256. The cubic root of 609009961 is about 847.6335381273.

The spelling of 609009961 in words is "six hundred nine million, nine thousand, nine hundred sixty-one".