409474279 has 4 divisors (see below), whose sum is σ = 409515120. Its totient is φ = 409433440.

The previous prime is 409474271. The next prime is 409474321. The reversal of 409474279 is 972474904.

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 409474279 - 2³ = 409474271 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 (409474271) 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, 6102 + ... + 29260.

It is an arithmetic number, because the mean of its divisors is an integer number (102378780).

Almost surely, 2^409474279 is an apocalyptic number.

409474279 is a deficient number, since it is larger than the sum of its proper divisors (40841).

409474279 is a wasteful number, since it uses less digits than its factorization.

409474279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40840.

The product of its (nonzero) digits is 508032, while the sum is 46.

The square root of 409474279 is about 20235.4708124125. The cubic root of 409474279 is about 742.5782231562.

The spelling of 409474279 in words is "four hundred nine million, four hundred seventy-four thousand, two hundred seventy-nine".