201679961 has 8 divisors (see below), whose sum is σ = 235395840. Its totient is φ = 169190208.

The previous prime is 201679921. The next prime is 201679987. The reversal of 201679961 is 169976102.

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 201679961 - 2⁶ = 201679897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201679921) 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, 306176 + ... + 306833.

It is an arithmetic number, because the mean of its divisors is an integer number (29424480).

Almost surely, 2^201679961 is an apocalyptic number.

It is an amenable number.

201679961 is a deficient number, since it is larger than the sum of its proper divisors (33715879).

201679961 is an equidigital number, since it uses as much as digits as its factorization.

201679961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613063.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 201679961 is about 14201.4070077581. The cubic root of 201679961 is about 586.4363961922.

The spelling of 201679961 in words is "two hundred one million, six hundred seventy-nine thousand, nine hundred sixty-one".