1231130447 has 2 divisors, whose sum is σ = 1231130448. Its totient is φ = 1231130446.

The previous prime is 1231130393. The next prime is 1231130449. The reversal of 1231130447 is 7440311321.

It is a strong prime.

It is an emirp because it is prime and its reverse (7440311321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1231130447 - 2²² = 1226936143 is a prime.

Together with 1231130449, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231130449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615565223 + 615565224.

It is an arithmetic number, because the mean of its divisors is an integer number (615565224).

Almost surely, 2^1231130447 is an apocalyptic number.

1231130447 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231130447 is an equidigital number, since it uses as much as digits as its factorization.

1231130447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 1231130447 is about 35087.4685179766. The cubic root of 1231130447 is about 1071.7694097178.

Adding to 1231130447 its reverse (7440311321), we get a palindrome (8671441768).

The spelling of 1231130447 in words is "one billion, two hundred thirty-one million, one hundred thirty thousand, four hundred forty-seven".