416818981 has 2 divisors, whose sum is σ = 416818982. Its totient is φ = 416818980.

The previous prime is 416818967. The next prime is 416819033. The reversal of 416818981 is 189818614.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 383572225 + 33246756 = 19585^2 + 5766^2 .

It is a cyclic number.

It is not a de Polignac number, because 416818981 - 2¹³ = 416810789 is a prime.

It is a super-2 number, since 2×416818981² = 347476125843756722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (416818481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208409490 + 208409491.

It is an arithmetic number, because the mean of its divisors is an integer number (208409491).

Almost surely, 2^416818981 is an apocalyptic number.

It is an amenable number.

416818981 is a deficient number, since it is larger than the sum of its proper divisors (1).

416818981 is an equidigital number, since it uses as much as digits as its factorization.

416818981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 110592, while the sum is 46.

The square root of 416818981 is about 20416.1451062633. The cubic root of 416818981 is about 746.9917909621.

The spelling of 416818981 in words is "four hundred sixteen million, eight hundred eighteen thousand, nine hundred eighty-one".