404393293 has 2 divisors, whose sum is σ = 404393294. Its totient is φ = 404393292.

The previous prime is 404393287. The next prime is 404393299. The reversal of 404393293 is 392393404.

It is a balanced prime because it is at equal distance from previous prime (404393287) and next prime (404393299).

It can be written as a sum of positive squares in only one way, i.e., 362635849 + 41757444 = 19043^2 + 6462^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404393293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404393299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202196646 + 202196647.

It is an arithmetic number, because the mean of its divisors is an integer number (202196647).

Almost surely, 2^404393293 is an apocalyptic number.

It is an amenable number.

404393293 is a deficient number, since it is larger than the sum of its proper divisors (1).

404393293 is an equidigital number, since it uses as much as digits as its factorization.

404393293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 37.

The square root of 404393293 is about 20109.5323913810. The cubic root of 404393293 is about 739.4939887414.

It can be divided in two parts, 4043 and 93293, that added together give a cube (97336 = 46³).

The spelling of 404393293 in words is "four hundred four million, three hundred ninety-three thousand, two hundred ninety-three".