409806057 has 4 divisors (see below), whose sum is σ = 546408080. Its totient is φ = 273204036.

The previous prime is 409806037. The next prime is 409806083. The reversal of 409806057 is 750608904.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 409806057 - 2⁶ = 409805993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (409806037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68301007 + ... + 68301012.

It is an arithmetic number, because the mean of its divisors is an integer number (136602020).

Almost surely, 2^409806057 is an apocalyptic number.

It is an amenable number.

409806057 is a deficient number, since it is larger than the sum of its proper divisors (136602023).

409806057 is a wasteful number, since it uses less digits than its factorization.

409806057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136602022.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 409806057 is about 20243.6670838067. The cubic root of 409806057 is about 742.7787279004.

The spelling of 409806057 in words is "four hundred nine million, eight hundred six thousand, fifty-seven".