17941961 has 2 divisors, whose sum is σ = 17941962. Its totient is φ = 17941960.

The previous prime is 17941949. The next prime is 17942011. The reversal of 17941961 is 16914971.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16605625 + 1336336 = 4075^2 + 1156^2 .

It is a cyclic number.

It is not a de Polignac number, because 17941961 - 2¹⁸ = 17679817 is a prime.

It is not a weakly prime, because it can be changed into another prime (17941361) 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 as a sum of consecutive naturals, namely, 8970980 + 8970981.

It is an arithmetic number, because the mean of its divisors is an integer number (8970981).

Almost surely, 2^17941961 is an apocalyptic number.

It is an amenable number.

17941961 is a deficient number, since it is larger than the sum of its proper divisors (1).

17941961 is an equidigital number, since it uses as much as digits as its factorization.

17941961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 38.

The square root of 17941961 is about 4235.7952027925. The cubic root of 17941961 is about 261.7921598183.

The spelling of 17941961 in words is "seventeen million, nine hundred forty-one thousand, nine hundred sixty-one".