131234443 has 2 divisors, whose sum is σ = 131234444. Its totient is φ = 131234442.

The previous prime is 131234437. The next prime is 131234447. The reversal of 131234443 is 344432131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131234443 is a prime.

It is not a weakly prime, because it can be changed into another prime (131234447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65617221 + 65617222.

It is an arithmetic number, because the mean of its divisors is an integer number (65617222).

Almost surely, 2^131234443 is an apocalyptic number.

131234443 is a deficient number, since it is larger than the sum of its proper divisors (1).

131234443 is an equidigital number, since it uses as much as digits as its factorization.

131234443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 25.

The square root of 131234443 is about 11455.7602541254. The cubic root of 131234443 is about 508.1780987847.

Adding to 131234443 its reverse (344432131), we get a palindrome (475666574).

The spelling of 131234443 in words is "one hundred thirty-one million, two hundred thirty-four thousand, four hundred forty-three".