409145899 has 2 divisors, whose sum is σ = 409145900. Its totient is φ = 409145898.

The previous prime is 409145887. The next prime is 409145939. The reversal of 409145899 is 998541904.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 409145899 - 2⁷ = 409145771 is a prime.

It is not a weakly prime, because it can be changed into another prime (409145299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204572949 + 204572950.

It is an arithmetic number, because the mean of its divisors is an integer number (204572950).

Almost surely, 2^409145899 is an apocalyptic number.

409145899 is a deficient number, since it is larger than the sum of its proper divisors (1).

409145899 is an equidigital number, since it uses as much as digits as its factorization.

409145899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 49.

The square root of 409145899 is about 20227.3552151536. The cubic root of 409145899 is about 742.3796652626.

The spelling of 409145899 in words is "four hundred nine million, one hundred forty-five thousand, eight hundred ninety-nine".