1345811447 has 2 divisors, whose sum is σ = 1345811448. Its totient is φ = 1345811446.

The previous prime is 1345811437. The next prime is 1345811449. The reversal of 1345811447 is 7441185431.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1345811447 - 2⁴ = 1345811431 is a prime.

It is a super-2 number, since 2×1345811447² = 3622416901752467618, which contains 22 as substring.

Together with 1345811449, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1345811447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1345811449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672905723 + 672905724.

It is an arithmetic number, because the mean of its divisors is an integer number (672905724).

Almost surely, 2^1345811447 is an apocalyptic number.

1345811447 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345811447 is an equidigital number, since it uses as much as digits as its factorization.

1345811447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53760, while the sum is 38.

The square root of 1345811447 is about 36685.3028745845. The cubic root of 1345811447 is about 1104.0652460805.

Adding to 1345811447 its reverse (7441185431), we get a palindrome (8786996878).

The spelling of 1345811447 in words is "one billion, three hundred forty-five million, eight hundred eleven thousand, four hundred forty-seven".