1183801921 has 2 divisors, whose sum is σ = 1183801922. Its totient is φ = 1183801920.

The previous prime is 1183801909. The next prime is 1183801933. The reversal of 1183801921 is 1291083811.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (1183801909) and next prime (1183801933).

It can be written as a sum of positive squares in only one way, i.e., 1138050225 + 45751696 = 33735^2 + 6764^2 .

It is a cyclic number.

It is not a de Polignac number, because 1183801921 - 2¹¹ = 1183799873 is a prime.

It is not a weakly prime, because it can be changed into another prime (1183801981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 591900960 + 591900961.

It is an arithmetic number, because the mean of its divisors is an integer number (591900961).

Almost surely, 2^1183801921 is an apocalyptic number.

It is an amenable number.

1183801921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1183801921 is an equidigital number, since it uses as much as digits as its factorization.

1183801921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 34.

The square root of 1183801921 is about 34406.4226707747. The cubic root of 1183801921 is about 1057.8554961346.

The spelling of 1183801921 in words is "one billion, one hundred eighty-three million, eight hundred one thousand, nine hundred twenty-one".