409385973 has 4 divisors (see below), whose sum is σ = 545847968. Its totient is φ = 272923980.

The previous prime is 409385927. The next prime is 409385987. The reversal of 409385973 is 379583904.

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 409385973 - 2⁹ = 409385461 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 (409385923) 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, 68230993 + ... + 68230998.

It is an arithmetic number, because the mean of its divisors is an integer number (136461992).

Almost surely, 2^409385973 is an apocalyptic number.

It is an amenable number.

409385973 is a deficient number, since it is larger than the sum of its proper divisors (136461995).

409385973 is a wasteful number, since it uses less digits than its factorization.

409385973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136461994.

The product of its (nonzero) digits is 816480, while the sum is 48.

The square root of 409385973 is about 20233.2887341628. The cubic root of 409385973 is about 742.5248385846.

The spelling of 409385973 in words is "four hundred nine million, three hundred eighty-five thousand, nine hundred seventy-three".