442400437 has 2 divisors, whose sum is σ = 442400438. Its totient is φ = 442400436.

The previous prime is 442400369. The next prime is 442400447. The reversal of 442400437 is 734004244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 421111441 + 21288996 = 20521^2 + 4614^2 .

It is a cyclic number.

It is not a de Polignac number, because 442400437 - 2¹¹ = 442398389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442400447) 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, 221200218 + 221200219.

It is an arithmetic number, because the mean of its divisors is an integer number (221200219).

Almost surely, 2^442400437 is an apocalyptic number.

It is an amenable number.

442400437 is a deficient number, since it is larger than the sum of its proper divisors (1).

442400437 is an equidigital number, since it uses as much as digits as its factorization.

442400437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 28.

The square root of 442400437 is about 21033.3173084989. The cubic root of 442400437 is about 761.9711280891.

The spelling of 442400437 in words is "four hundred forty-two million, four hundred thousand, four hundred thirty-seven".