2001475961 has 2 divisors, whose sum is σ = 2001475962. Its totient is φ = 2001475960.

The previous prime is 2001475951. The next prime is 2001475963. The reversal of 2001475961 is 1695741002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1959744361 + 41731600 = 44269^2 + 6460^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001475961 is a prime.

It is a Sophie Germain prime.

Together with 2001475963, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2001475963) 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 as a sum of consecutive naturals, namely, 1000737980 + 1000737981.

It is an arithmetic number, because the mean of its divisors is an integer number (1000737981).

Almost surely, 2^2001475961 is an apocalyptic number.

It is an amenable number.

2001475961 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001475961 is an equidigital number, since it uses as much as digits as its factorization.

2001475961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 2001475961 is about 44737.8582522677. The cubic root of 2001475961 is about 1260.2309060736.

The spelling of 2001475961 in words is "two billion, one million, four hundred seventy-five thousand, nine hundred sixty-one".