418949081 has 2 divisors, whose sum is σ = 418949082. Its totient is φ = 418949080.

The previous prime is 418949009. The next prime is 418949093. The reversal of 418949081 is 180949814.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 412902400 + 6046681 = 20320^2 + 2459^2 .

It is a cyclic number.

It is not a de Polignac number, because 418949081 - 2¹⁸ = 418686937 is a prime.

It is a super-2 number, since 2×418949081² = 351036664941489122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (418945081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209474540 + 209474541.

It is an arithmetic number, because the mean of its divisors is an integer number (209474541).

Almost surely, 2^418949081 is an apocalyptic number.

It is an amenable number.

418949081 is a deficient number, since it is larger than the sum of its proper divisors (1).

418949081 is an equidigital number, since it uses as much as digits as its factorization.

418949081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 44.

The square root of 418949081 is about 20468.2456747030. The cubic root of 418949081 is about 748.2620981140.

The spelling of 418949081 in words is "four hundred eighteen million, nine hundred forty-nine thousand, eighty-one".