404343253 has 4 divisors (see below), whose sum is σ = 405660640. Its totient is φ = 403025868.

The previous prime is 404343217. The next prime is 404343257. The reversal of 404343253 is 352343404.

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.

It is a cyclic number.

It is not a de Polignac number, because 404343253 - 2²¹ = 402246101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404343257) 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, 658233 + ... + 658846.

It is an arithmetic number, because the mean of its divisors is an integer number (101415160).

Almost surely, 2^404343253 is an apocalyptic number.

It is an amenable number.

404343253 is a deficient number, since it is larger than the sum of its proper divisors (1317387).

404343253 is a wasteful number, since it uses less digits than its factorization.

404343253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317386.

The product of its (nonzero) digits is 17280, while the sum is 28.

The square root of 404343253 is about 20108.2881668232. The cubic root of 404343253 is about 739.4634855932.

Adding to 404343253 its reverse (352343404), we get a palindrome (756686657).

The spelling of 404343253 in words is "four hundred four million, three hundred forty-three thousand, two hundred fifty-three".