804040253 has 4 divisors (see below), whose sum is σ = 804301980. Its totient is φ = 803778528.

The previous prime is 804040247. The next prime is 804040277. The reversal of 804040253 is 352040408.

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

It can be written as a sum of positive squares in 2 ways, for example, as 289068004 + 514972249 = 17002^2 + 22693^2 .

It is a cyclic number.

It is not a de Polignac number, because 804040253 - 2⁶ = 804040189 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 (804040753) 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, 126200 + ... + 132417.

It is an arithmetic number, because the mean of its divisors is an integer number (201075495).

Almost surely, 2^804040253 is an apocalyptic number.

It is an amenable number.

804040253 is a deficient number, since it is larger than the sum of its proper divisors (261727).

804040253 is a wasteful number, since it uses less digits than its factorization.

804040253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261726.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 804040253 is about 28355.6035555585. The cubic root of 804040253 is about 929.8779093590.

The spelling of 804040253 in words is "eight hundred four million, forty thousand, two hundred fifty-three".