409864091 has 32 divisors (see below), whose sum is σ = 518945280. Its totient is φ = 315104256.

The previous prime is 409864061. The next prime is 409864093. The reversal of 409864091 is 190468904.

It is a cyclic number.

It is not a de Polignac number, because 409864091 - 2⁶ = 409864027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (409864093) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 520400 + ... + 521186.

It is an arithmetic number, because the mean of its divisors is an integer number (16217040).

Almost surely, 2^409864091 is an apocalyptic number.

409864091 is a deficient number, since it is larger than the sum of its proper divisors (109081189).

409864091 is a wasteful number, since it uses less digits than its factorization.

409864091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 409864091 is about 20245.1004196077. The cubic root of 409864091 is about 742.8137887015.

The spelling of 409864091 in words is "four hundred nine million, eight hundred sixty-four thousand, ninety-one".