405020353 has 2 divisors, whose sum is σ = 405020354. Its totient is φ = 405020352.

The previous prime is 405020339. The next prime is 405020381. The reversal of 405020353 is 353020504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207561649 + 197458704 = 14407^2 + 14052^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405020353 is a prime.

It is not a weakly prime, because it can be changed into another prime (405020303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202510176 + 202510177.

It is an arithmetic number, because the mean of its divisors is an integer number (202510177).

Almost surely, 2^405020353 is an apocalyptic number.

It is an amenable number.

405020353 is a deficient number, since it is larger than the sum of its proper divisors (1).

405020353 is an equidigital number, since it uses as much as digits as its factorization.

405020353 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 22.

The square root of 405020353 is about 20125.1174654957. The cubic root of 405020353 is about 739.8760158729.

Adding to 405020353 its reverse (353020504), we get a palindrome (758040857).

The spelling of 405020353 in words is "four hundred five million, twenty thousand, three hundred fifty-three".