1163652821 has 2 divisors, whose sum is σ = 1163652822. Its totient is φ = 1163652820.

The previous prime is 1163652781. The next prime is 1163652881. The reversal of 1163652821 is 1282563611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 893412100 + 270240721 = 29890^2 + 16439^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1163652821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1163652881) 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, 581826410 + 581826411.

It is an arithmetic number, because the mean of its divisors is an integer number (581826411).

Almost surely, 2^1163652821 is an apocalyptic number.

It is an amenable number.

1163652821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1163652821 is an equidigital number, since it uses as much as digits as its factorization.

1163652821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 35.

The square root of 1163652821 is about 34112.3558406628. The cubic root of 1163652821 is about 1051.8193163283.

The spelling of 1163652821 in words is "one billion, one hundred sixty-three million, six hundred fifty-two thousand, eight hundred twenty-one".