1121896957 has 2 divisors, whose sum is σ = 1121896958. Its totient is φ = 1121896956.

The previous prime is 1121896907. The next prime is 1121897071. The reversal of 1121896957 is 7596981211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1092368601 + 29528356 = 33051^2 + 5434^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121896957 - 2¹¹ = 1121894909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1121896957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121896907) 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, 560948478 + 560948479.

It is an arithmetic number, because the mean of its divisors is an integer number (560948479).

Almost surely, 2^1121896957 is an apocalyptic number.

It is an amenable number.

1121896957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121896957 is an equidigital number, since it uses as much as digits as its factorization.

1121896957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 49.

The square root of 1121896957 is about 33494.7302870168. The cubic root of 1121896957 is about 1039.0847955057.

The spelling of 1121896957 in words is "one billion, one hundred twenty-one million, eight hundred ninety-six thousand, nine hundred fifty-seven".