418994909 has 16 divisors (see below), whose sum is σ = 432899376. Its totient is φ = 405388800.

The previous prime is 418994899. The next prime is 418994911. The reversal of 418994909 is 909499814.

It can be written as a sum of positive squares in 8 ways, for example, as 205922500 + 213072409 = 14350^2 + 14597^2 .

It is a cyclic number.

It is not a de Polignac number, because 418994909 - 2⁴ = 418994893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (418904909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1512479 + ... + 1512755.

It is an arithmetic number, because the mean of its divisors is an integer number (27056211).

Almost surely, 2^418994909 is an apocalyptic number.

It is an amenable number.

418994909 is a deficient number, since it is larger than the sum of its proper divisors (13904467).

418994909 is a wasteful number, since it uses less digits than its factorization.

418994909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656.

The product of its (nonzero) digits is 839808, while the sum is 53.

The square root of 418994909 is about 20469.3651342683. The cubic root of 418994909 is about 748.2893807494.

The spelling of 418994909 in words is "four hundred eighteen million, nine hundred ninety-four thousand, nine hundred nine".