402227393 has 2 divisors, whose sum is σ = 402227394. Its totient is φ = 402227392.

The previous prime is 402227389. The next prime is 402227521. The reversal of 402227393 is 393722204.

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., 401321089 + 906304 = 20033^2 + 952^2 .

It is a cyclic number.

It is not a de Polignac number, because 402227393 - 2² = 402227389 is a prime.

It is not a weakly prime, because it can be changed into another prime (402227323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201113696 + 201113697.

It is an arithmetic number, because the mean of its divisors is an integer number (201113697).

Almost surely, 2^402227393 is an apocalyptic number.

It is an amenable number.

402227393 is a deficient number, since it is larger than the sum of its proper divisors (1).

402227393 is an equidigital number, since it uses as much as digits as its factorization.

402227393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 402227393 is about 20055.6075200927. The cubic root of 402227393 is about 738.1714000045.

Adding to 402227393 its reverse (393722204), we get a palindrome (795949597).

The spelling of 402227393 in words is "four hundred two million, two hundred twenty-seven thousand, three hundred ninety-three".