409155091 has 4 divisors (see below), whose sum is σ = 409195800. Its totient is φ = 409114384.

The previous prime is 409155079. The next prime is 409155127. The reversal of 409155091 is 190551904.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 409155091 - 2²¹ = 407057939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (409155001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6780 + ... + 29398.

It is an arithmetic number, because the mean of its divisors is an integer number (102298950).

Almost surely, 2^409155091 is an apocalyptic number.

409155091 is a deficient number, since it is larger than the sum of its proper divisors (40709).

409155091 is a wasteful number, since it uses less digits than its factorization.

409155091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40708.

The product of its (nonzero) digits is 8100, while the sum is 34.

The square root of 409155091 is about 20227.5824309283. The cubic root of 409155091 is about 742.3852247324.

The spelling of 409155091 in words is "four hundred nine million, one hundred fifty-five thousand, ninety-one".