442903861 has 2 divisors, whose sum is σ = 442903862. Its totient is φ = 442903860.

The previous prime is 442903837. The next prime is 442903883. The reversal of 442903861 is 168309244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 225930961 + 216972900 = 15031^2 + 14730^2 .

It is a cyclic number.

It is not a de Polignac number, because 442903861 - 2⁵ = 442903829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 442903861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442903831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221451930 + 221451931.

It is an arithmetic number, because the mean of its divisors is an integer number (221451931).

Almost surely, 2^442903861 is an apocalyptic number.

It is an amenable number.

442903861 is a deficient number, since it is larger than the sum of its proper divisors (1).

442903861 is an equidigital number, since it uses as much as digits as its factorization.

442903861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 442903861 is about 21045.2812050588. The cubic root of 442903861 is about 762.2600436739.

The spelling of 442903861 in words is "four hundred forty-two million, nine hundred three thousand, eight hundred sixty-one".