999278741 has 2 divisors, whose sum is σ = 999278742. Its totient is φ = 999278740.

The previous prime is 999278729. The next prime is 999278807. The reversal of 999278741 is 147872999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 816244900 + 183033841 = 28570^2 + 13529^2 .

It is a cyclic number.

It is not a de Polignac number, because 999278741 - 2¹⁰ = 999277717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999278041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499639370 + 499639371.

It is an arithmetic number, because the mean of its divisors is an integer number (499639371).

Almost surely, 2^999278741 is an apocalyptic number.

It is an amenable number.

999278741 is a deficient number, since it is larger than the sum of its proper divisors (1).

999278741 is an equidigital number, since it uses as much as digits as its factorization.

999278741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2286144, while the sum is 56.

The square root of 999278741 is about 31611.3704384989. The cubic root of 999278741 is about 999.7595225085.

The spelling of 999278741 in words is "nine hundred ninety-nine million, two hundred seventy-eight thousand, seven hundred forty-one".