442648253 has 2 divisors, whose sum is σ = 442648254. Its totient is φ = 442648252.

The previous prime is 442648247. The next prime is 442648333. The reversal of 442648253 is 352846244.

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., 424483609 + 18164644 = 20603^2 + 4262^2 .

It is a cyclic number.

It is not a de Polignac number, because 442648253 - 2⁶ = 442648189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442648223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221324126 + 221324127.

It is an arithmetic number, because the mean of its divisors is an integer number (221324127).

Almost surely, 2^442648253 is an apocalyptic number.

It is an amenable number.

442648253 is a deficient number, since it is larger than the sum of its proper divisors (1).

442648253 is an equidigital number, since it uses as much as digits as its factorization.

442648253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 184320, while the sum is 38.

The square root of 442648253 is about 21039.2075183454. The cubic root of 442648253 is about 762.1133773381.

The spelling of 442648253 in words is "four hundred forty-two million, six hundred forty-eight thousand, two hundred fifty-three".