1231302073 has 2 divisors, whose sum is σ = 1231302074. Its totient is φ = 1231302072.

The previous prime is 1231302053. The next prime is 1231302131. The reversal of 1231302073 is 3702031321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 923369769 + 307932304 = 30387^2 + 17548^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231302073 - 2²⁵ = 1197747641 is a prime.

It is a super-2 number, since 2×1231302073² = 3032209589948194658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1231302053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615651036 + 615651037.

It is an arithmetic number, because the mean of its divisors is an integer number (615651037).

Almost surely, 2^1231302073 is an apocalyptic number.

It is an amenable number.

1231302073 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231302073 is an equidigital number, since it uses as much as digits as its factorization.

1231302073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 1231302073 is about 35089.9141207271. The cubic root of 1231302073 is about 1071.8192108174.

Adding to 1231302073 its reverse (3702031321), we get a palindrome (4933333394).

The spelling of 1231302073 in words is "one billion, two hundred thirty-one million, three hundred two thousand, seventy-three".