408791 has 4 divisors (see below), whose sum is σ = 410184. Its totient is φ = 407400.

The previous prime is 408787. The next prime is 408803. The reversal of 408791 is 197804.

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 408791 - 2² = 408787 is a prime.

It is a super-2 number, since 2×408791² = 334220163362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408701) 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, 65 + ... + 906.

It is an arithmetic number, because the mean of its divisors is an integer number (102546).

2⁴⁰⁸⁷⁹¹ is an apocalyptic number.

408791 is a deficient number, since it is larger than the sum of its proper divisors (1393).

408791 is an equidigital number, since it uses as much as digits as its factorization.

408791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1392.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 408791 is about 639.3676563606. The cubic root of 408791 is about 74.2164952925.

The spelling of 408791 in words is "four hundred eight thousand, seven hundred ninety-one".