416791681 has 2 divisors, whose sum is σ = 416791682. Its totient is φ = 416791680.

The previous prime is 416791667. The next prime is 416791709. The reversal of 416791681 is 186197614.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 243079281 + 173712400 = 15591^2 + 13180^2 .

It is a cyclic number.

It is not a de Polignac number, because 416791681 - 2⁵ = 416791649 is a prime.

It is a super-2 number, since 2×416791681² = 347430610701611522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (416791631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208395840 + 208395841.

It is an arithmetic number, because the mean of its divisors is an integer number (208395841).

Almost surely, 2^416791681 is an apocalyptic number.

It is an amenable number.

416791681 is a deficient number, since it is larger than the sum of its proper divisors (1).

416791681 is an equidigital number, since it uses as much as digits as its factorization.

416791681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 43.

The square root of 416791681 is about 20415.4765068073. The cubic root of 416791681 is about 746.9754822670.

The spelling of 416791681 in words is "four hundred sixteen million, seven hundred ninety-one thousand, six hundred eighty-one".