409204893 has 4 divisors (see below), whose sum is σ = 545606528. Its totient is φ = 272803260.

The previous prime is 409204853. The next prime is 409204907. The reversal of 409204893 is 398402904.

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 409204893 - 2¹³ = 409196701 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 (409204853) 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, 68200813 + ... + 68200818.

It is an arithmetic number, because the mean of its divisors is an integer number (136401632).

Almost surely, 2^409204893 is an apocalyptic number.

It is an amenable number.

409204893 is a deficient number, since it is larger than the sum of its proper divisors (136401635).

409204893 is a wasteful number, since it uses less digits than its factorization.

409204893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136401634.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 409204893 is about 20228.8134352957. The cubic root of 409204893 is about 742.4153443372.

The spelling of 409204893 in words is "four hundred nine million, two hundred four thousand, eight hundred ninety-three".