409655 has 4 divisors (see below), whose sum is σ = 491592. Its totient is φ = 327720.

The previous prime is 409639. The next prime is 409657. The reversal of 409655 is 556904.

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

It is not a de Polignac number, because 409655 - 2⁴ = 409639 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409657) 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, 40961 + ... + 40970.

It is an arithmetic number, because the mean of its divisors is an integer number (122898).

2⁴⁰⁹⁶⁵⁵ is an apocalyptic number.

409655 is a deficient number, since it is larger than the sum of its proper divisors (81937).

409655 is an equidigital number, since it uses as much as digits as its factorization.

409655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81936.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 409655 is about 640.0429673077. The cubic root of 409655 is about 74.2687452435.

The spelling of 409655 in words is "four hundred nine thousand, six hundred fifty-five".