409405719 has 4 divisors (see below), whose sum is σ = 545874296. Its totient is φ = 272937144.

The previous prime is 409405699. The next prime is 409405721. The reversal of 409405719 is 917504904.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 409405719 - 2⁸ = 409405463 is a prime.

It is a super-2 number, since 2×409405719² = 335226085499813922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409405519) 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, 68234284 + ... + 68234289.

It is an arithmetic number, because the mean of its divisors is an integer number (136468574).

Almost surely, 2^409405719 is an apocalyptic number.

409405719 is a deficient number, since it is larger than the sum of its proper divisors (136468577).

409405719 is a wasteful number, since it uses less digits than its factorization.

409405719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136468576.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 409405719 is about 20233.7766865210. The cubic root of 409405719 is about 742.5367765117.

The spelling of 409405719 in words is "four hundred nine million, four hundred five thousand, seven hundred nineteen".