1231236047 has 2 divisors, whose sum is σ = 1231236048. Its totient is φ = 1231236046.

The previous prime is 1231236037. The next prime is 1231236077. The reversal of 1231236047 is 7406321321.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1231236047 - 2¹⁰ = 1231235023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231236037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615618023 + 615618024.

It is an arithmetic number, because the mean of its divisors is an integer number (615618024).

Almost surely, 2^1231236047 is an apocalyptic number.

1231236047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231236047 is an equidigital number, since it uses as much as digits as its factorization.

1231236047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 1231236047 is about 35088.9732964645. The cubic root of 1231236047 is about 1071.8000524533.

Adding to 1231236047 its reverse (7406321321), we get a palindrome (8637557368).

The spelling of 1231236047 in words is "one billion, two hundred thirty-one million, two hundred thirty-six thousand, forty-seven".