402244393 has 2 divisors, whose sum is σ = 402244394. Its totient is φ = 402244392.

The previous prime is 402244387. The next prime is 402244397. The reversal of 402244393 is 393442204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 262342809 + 139901584 = 16197^2 + 11828^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402244393 is a prime.

It is not a weakly prime, because it can be changed into another prime (402244397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201122196 + 201122197.

It is an arithmetic number, because the mean of its divisors is an integer number (201122197).

Almost surely, 2^402244393 is an apocalyptic number.

It is an amenable number.

402244393 is a deficient number, since it is larger than the sum of its proper divisors (1).

402244393 is an equidigital number, since it uses as much as digits as its factorization.

402244393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 402244393 is about 20056.0313372312. The cubic root of 402244393 is about 738.1817993766.

Adding to 402244393 its reverse (393442204), we get a palindrome (795686597).

The spelling of 402244393 in words is "four hundred two million, two hundred forty-four thousand, three hundred ninety-three".