1231802353 has 2 divisors, whose sum is σ = 1231802354. Its totient is φ = 1231802352.

The previous prime is 1231802339. The next prime is 1231802417. The reversal of 1231802353 is 3532081321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1046651904 + 185150449 = 32352^2 + 13607^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231802353 - 2²¹ = 1229705201 is a prime.

It is not a weakly prime, because it can be changed into another prime (1231802153) 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, 615901176 + 615901177.

It is an arithmetic number, because the mean of its divisors is an integer number (615901177).

Almost surely, 2^1231802353 is an apocalyptic number.

It is an amenable number.

1231802353 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231802353 is an equidigital number, since it uses as much as digits as its factorization.

1231802353 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 1231802353 is about 35097.0419408816. The cubic root of 1231802353 is about 1071.9643517815.

Adding to 1231802353 its reverse (3532081321), we get a palindrome (4763883674).

The spelling of 1231802353 in words is "one billion, two hundred thirty-one million, eight hundred two thousand, three hundred fifty-three".