405663253 has 2 divisors, whose sum is σ = 405663254. Its totient is φ = 405663252.

The previous prime is 405663239. The next prime is 405663277. The reversal of 405663253 is 352366504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 404130609 + 1532644 = 20103^2 + 1238^2 .

It is a cyclic number.

It is not a de Polignac number, because 405663253 - 2⁵ = 405663221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405663233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202831626 + 202831627.

It is an arithmetic number, because the mean of its divisors is an integer number (202831627).

Almost surely, 2^405663253 is an apocalyptic number.

It is an amenable number.

405663253 is a deficient number, since it is larger than the sum of its proper divisors (1).

405663253 is an equidigital number, since it uses as much as digits as its factorization.

405663253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 34.

The square root of 405663253 is about 20141.0837096716. The cubic root of 405663253 is about 740.2672841382.

The spelling of 405663253 in words is "four hundred five million, six hundred sixty-three thousand, two hundred fifty-three".