404280823 has 2 divisors, whose sum is σ = 404280824. Its totient is φ = 404280822.

The previous prime is 404280763. The next prime is 404280901. The reversal of 404280823 is 328082404.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404280823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404280923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202140411 + 202140412.

It is an arithmetic number, because the mean of its divisors is an integer number (202140412).

Almost surely, 2^404280823 is an apocalyptic number.

404280823 is a deficient number, since it is larger than the sum of its proper divisors (1).

404280823 is an equidigital number, since it uses as much as digits as its factorization.

404280823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12288, while the sum is 31.

The square root of 404280823 is about 20106.7357619281. The cubic root of 404280823 is about 739.4254262783.

The spelling of 404280823 in words is "four hundred four million, two hundred eighty thousand, eight hundred twenty-three".