1183253921 has 2 divisors, whose sum is σ = 1183253922. Its totient is φ = 1183253920.

The previous prime is 1183253879. The next prime is 1183253923. The reversal of 1183253921 is 1293523811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 733813921 + 449440000 = 27089^2 + 21200^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1183253921 is a prime.

Together with 1183253923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1183253923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 591626960 + 591626961.

It is an arithmetic number, because the mean of its divisors is an integer number (591626961).

Almost surely, 2^1183253921 is an apocalyptic number.

It is an amenable number.

1183253921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1183253921 is an equidigital number, since it uses as much as digits as its factorization.

1183253921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 35.

The square root of 1183253921 is about 34398.4581195146. The cubic root of 1183253921 is about 1057.6922384488.

The spelling of 1183253921 in words is "one billion, one hundred eighty-three million, two hundred fifty-three thousand, nine hundred twenty-one".