1231443119 has 2 divisors, whose sum is σ = 1231443120. Its totient is φ = 1231443118.

The previous prime is 1231443107. The next prime is 1231443121. The reversal of 1231443119 is 9113441321.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1231443119 - 2¹² = 1231439023 is a prime.

It is a super-2 number, since 2×1231443119² = 3032904310664896322, which contains 22 as substring.

Together with 1231443121, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1231443091 and 1231443100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231443019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615721559 + 615721560.

It is an arithmetic number, because the mean of its divisors is an integer number (615721560).

Almost surely, 2^1231443119 is an apocalyptic number.

1231443119 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231443119 is an equidigital number, since it uses as much as digits as its factorization.

1231443119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 29.

The square root of 1231443119 is about 35091.9238429585. The cubic root of 1231443119 is about 1071.8601349858.

The spelling of 1231443119 in words is "one billion, two hundred thirty-one million, four hundred forty-three thousand, one hundred nineteen".