416918981 has 2 divisors, whose sum is σ = 416918982. Its totient is φ = 416918980.

The previous prime is 416918947. The next prime is 416918989. The reversal of 416918981 is 189819614.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 371140225 + 45778756 = 19265^2 + 6766^2 .

It is a cyclic number.

It is not a de Polignac number, because 416918981 - 2⁶ = 416918917 is a prime.

It is a super-2 number, since 2×416918981² = 347642873436156722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (416918989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208459490 + 208459491.

It is an arithmetic number, because the mean of its divisors is an integer number (208459491).

Almost surely, 2^416918981 is an apocalyptic number.

It is an amenable number.

416918981 is a deficient number, since it is larger than the sum of its proper divisors (1).

416918981 is an equidigital number, since it uses as much as digits as its factorization.

416918981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 47.

The square root of 416918981 is about 20418.5940015467. The cubic root of 416918981 is about 747.0515236915.

The spelling of 416918981 in words is "four hundred sixteen million, nine hundred eighteen thousand, nine hundred eighty-one".