1071684528949 has 2 divisors, whose sum is σ = 1071684528950. Its totient is φ = 1071684528948.

The previous prime is 1071684528947. The next prime is 1071684529001. The reversal of 1071684528949 is 9498254861701.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1070101284849 + 1583244100 = 1034457^2 + 39790^2 .

It is a cyclic number.

It is not a de Polignac number, because 1071684528949 - 2¹ = 1071684528947 is a prime.

It is a super-2 number, since 2×1071684528949² (a number of 25 digits) contains 22 as substring.

Together with 1071684528947, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1071684528947) 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, 535842264474 + 535842264475.

It is an arithmetic number, because the mean of its divisors is an integer number (535842264475).

Almost surely, 2^{1071684528949} is an apocalyptic number.

It is an amenable number.

1071684528949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1071684528949 is an equidigital number, since it uses as much as digits as its factorization.

1071684528949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34836480, while the sum is 64.

The spelling of 1071684528949 in words is "one trillion, seventy-one billion, six hundred eighty-four million, five hundred twenty-eight thousand, nine hundred forty-nine".