1121895613 has 2 divisors, whose sum is σ = 1121895614. Its totient is φ = 1121895612.

The previous prime is 1121895583. The next prime is 1121895623. The reversal of 1121895613 is 3165981211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 640444249 + 481451364 = 25307^2 + 21942^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121895613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121895623) 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, 560947806 + 560947807.

It is an arithmetic number, because the mean of its divisors is an integer number (560947807).

Almost surely, 2^1121895613 is an apocalyptic number.

It is an amenable number.

1121895613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121895613 is an equidigital number, since it uses as much as digits as its factorization.

1121895613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 37.

The square root of 1121895613 is about 33494.7102241533. The cubic root of 1121895613 is about 1039.0843805744.

The spelling of 1121895613 in words is "one billion, one hundred twenty-one million, eight hundred ninety-five thousand, six hundred thirteen".