201956017 has 2 divisors, whose sum is σ = 201956018. Its totient is φ = 201956016.

The previous prime is 201956011. The next prime is 201956057. The reversal of 201956017 is 710659102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201384481 + 571536 = 14191^2 + 756^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201956017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201956017.

It is not a weakly prime, because it can be changed into another prime (201956011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100978008 + 100978009.

It is an arithmetic number, because the mean of its divisors is an integer number (100978009).

Almost surely, 2^201956017 is an apocalyptic number.

It is an amenable number.

201956017 is a deficient number, since it is larger than the sum of its proper divisors (1).

201956017 is an equidigital number, since it uses as much as digits as its factorization.

201956017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 201956017 is about 14211.1230027750. The cubic root of 201956017 is about 586.7038421619.

The spelling of 201956017 in words is "two hundred one million, nine hundred fifty-six thousand, seventeen".