418049861 has 2 divisors, whose sum is σ = 418049862. Its totient is φ = 418049860.

The previous prime is 418049843. The next prime is 418049971. The reversal of 418049861 is 168940814.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 417425761 + 624100 = 20431^2 + 790^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-418049861 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (418049561) 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, 209024930 + 209024931.

It is an arithmetic number, because the mean of its divisors is an integer number (209024931).

Almost surely, 2^418049861 is an apocalyptic number.

It is an amenable number.

418049861 is a deficient number, since it is larger than the sum of its proper divisors (1).

418049861 is an equidigital number, since it uses as much as digits as its factorization.

418049861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 418049861 is about 20446.2676545134. The cubic root of 418049861 is about 747.7263653754.

The spelling of 418049861 in words is "four hundred eighteen million, forty-nine thousand, eight hundred sixty-one".