999261941 has 2 divisors, whose sum is σ = 999261942. Its totient is φ = 999261940.

The previous prime is 999261931. The next prime is 999261959. The reversal of 999261941 is 149162999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 844134916 + 155127025 = 29054^2 + 12455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999261941 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 999261941.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999261911) 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, 499630970 + 499630971.

It is an arithmetic number, because the mean of its divisors is an integer number (499630971).

Almost surely, 2^999261941 is an apocalyptic number.

It is an amenable number.

999261941 is a deficient number, since it is larger than the sum of its proper divisors (1).

999261941 is an equidigital number, since it uses as much as digits as its factorization.

999261941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 314928, while the sum is 50.

The square root of 999261941 is about 31611.1047102122. The cubic root of 999261941 is about 999.7539197828.

The spelling of 999261941 in words is "nine hundred ninety-nine million, two hundred sixty-one thousand, nine hundred forty-one".