999442441 has 2 divisors, whose sum is σ = 999442442. Its totient is φ = 999442440.

The previous prime is 999442439. The next prime is 999442447. The reversal of 999442441 is 144244999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 819104400 + 180338041 = 28620^2 + 13429^2 .

It is an emirp because it is prime and its reverse (144244999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999442441 - 2¹ = 999442439 is a prime.

Together with 999442439, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 999442391 and 999442400.

It is not a weakly prime, because it can be changed into another prime (999442447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499721220 + 499721221.

It is an arithmetic number, because the mean of its divisors is an integer number (499721221).

Almost surely, 2^999442441 is an apocalyptic number.

It is an amenable number.

999442441 is a deficient number, since it is larger than the sum of its proper divisors (1).

999442441 is an equidigital number, since it uses as much as digits as its factorization.

999442441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 46.

The square root of 999442441 is about 31613.9595906618. The cubic root of 999442441 is about 999.8141124480.

The spelling of 999442441 in words is "nine hundred ninety-nine million, four hundred forty-two thousand, four hundred forty-one".