1231330307 has 2 divisors, whose sum is σ = 1231330308. Its totient is φ = 1231330306.

The previous prime is 1231330301. The next prime is 1231330337. The reversal of 1231330307 is 7030331321.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1231330307 - 2²² = 1227136003 is a prime.

It is a super-3 number, since 3×1231330307³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1231330301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615665153 + 615665154.

It is an arithmetic number, because the mean of its divisors is an integer number (615665154).

Almost surely, 2^1231330307 is an apocalyptic number.

1231330307 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231330307 is an equidigital number, since it uses as much as digits as its factorization.

1231330307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 23.

The square root of 1231330307 is about 35090.3164277554. The cubic root of 1231330307 is about 1071.8274030969.

Adding to 1231330307 its reverse (7030331321), we get a palindrome (8261661628).

The spelling of 1231330307 in words is "one billion, two hundred thirty-one million, three hundred thirty thousand, three hundred seven".