404797 has 4 divisors (see below), whose sum is σ = 406080. Its totient is φ = 403516.

The previous prime is 404783. The next prime is 404819. The reversal of 404797 is 797404.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404797 is a prime.

It is a super-2 number, since 2×404797² = 327721222418, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Duffinian number.

404797 is a lucky 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 (404197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204 + ... + 922.

It is an arithmetic number, because the mean of its divisors is an integer number (101520).

2⁴⁰⁴⁷⁹⁷ is an apocalyptic number.

It is an amenable number.

404797 is a deficient number, since it is larger than the sum of its proper divisors (1283).

404797 is an equidigital number, since it uses as much as digits as its factorization.

404797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 404797 is about 636.2365912143. The cubic root of 404797 is about 73.9739986566.

The spelling of 404797 in words is "four hundred four thousand, seven hundred ninety-seven".