409387 has 4 divisors (see below), whose sum is σ = 446616. Its totient is φ = 372160.

The previous prime is 409379. The next prime is 409391. The reversal of 409387 is 783904.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 409387 - 2³ = 409379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (409327) 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, 18598 + ... + 18619.

It is an arithmetic number, because the mean of its divisors is an integer number (111654).

2⁴⁰⁹³⁸⁷ is an apocalyptic number.

409387 is a deficient number, since it is larger than the sum of its proper divisors (37229).

409387 is a wasteful number, since it uses less digits than its factorization.

409387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37228.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 409387 is about 639.8335721107. The cubic root of 409387 is about 74.2525459492.

The spelling of 409387 in words is "four hundred nine thousand, three hundred eighty-seven".