409597385 has 4 divisors (see below), whose sum is σ = 491516868. Its totient is φ = 327677904.

The previous prime is 409597373. The next prime is 409597453. The reversal of 409597385 is 583795904.

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

It can be written as a sum of positive squares in 2 ways, for example, as 175721536 + 233875849 = 13256^2 + 15293^2 .

It is a cyclic number.

It is not a de Polignac number, because 409597385 - 2¹⁶ = 409531849 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40959734 + ... + 40959743.

It is an arithmetic number, because the mean of its divisors is an integer number (122879217).

Almost surely, 2^409597385 is an apocalyptic number.

It is an amenable number.

409597385 is a deficient number, since it is larger than the sum of its proper divisors (81919483).

409597385 is an equidigital number, since it uses as much as digits as its factorization.

409597385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81919482.

The product of its (nonzero) digits is 1360800, while the sum is 50.

The square root of 409597385 is about 20238.5124206301. The cubic root of 409597385 is about 742.6526329379.

The spelling of 409597385 in words is "four hundred nine million, five hundred ninety-seven thousand, three hundred eighty-five".