402240173 has 2 divisors, whose sum is σ = 402240174. Its totient is φ = 402240172.

The previous prime is 402240149. The next prime is 402240187. The reversal of 402240173 is 371042204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 309830404 + 92409769 = 17602^2 + 9613^2 .

It is a cyclic number.

It is not a de Polignac number, because 402240173 - 2¹⁸ = 401978029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402240133) 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, 201120086 + 201120087.

It is an arithmetic number, because the mean of its divisors is an integer number (201120087).

Almost surely, 2^402240173 is an apocalyptic number.

It is an amenable number.

402240173 is a deficient number, since it is larger than the sum of its proper divisors (1).

402240173 is an equidigital number, since it uses as much as digits as its factorization.

402240173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 402240173 is about 20055.9261316948. The cubic root of 402240173 is about 738.1792179128.

Adding to 402240173 its reverse (371042204), we get a palindrome (773282377).

The spelling of 402240173 in words is "four hundred two million, two hundred forty thousand, one hundred seventy-three".