402044593 has 2 divisors, whose sum is σ = 402044594. Its totient is φ = 402044592.

The previous prime is 402044581. The next prime is 402044639. The reversal of 402044593 is 395440204.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 364504464 + 37540129 = 19092^2 + 6127^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402044593 is a prime.

It is not a weakly prime, because it can be changed into another prime (402048593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201022296 + 201022297.

It is an arithmetic number, because the mean of its divisors is an integer number (201022297).

Almost surely, 2^402044593 is an apocalyptic number.

It is an amenable number.

402044593 is a deficient number, since it is larger than the sum of its proper divisors (1).

402044593 is an equidigital number, since it uses as much as digits as its factorization.

402044593 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 402044593 is about 20051.0496732715. The cubic root of 402044593 is about 738.0595576477.

Adding to 402044593 its reverse (395440204), we get a palindrome (797484797).

The spelling of 402044593 in words is "four hundred two million, forty-four thousand, five hundred ninety-three".