1343443631 has 2 divisors, whose sum is σ = 1343443632. Its totient is φ = 1343443630.

The previous prime is 1343443609. The next prime is 1343443663. The reversal of 1343443631 is 1363443431.

It is an a-pointer prime, because the next prime (1343443663) can be obtained adding 1343443631 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1343443631 is a prime.

It is a super-2 number, since 2×1343443631² = 3609681579348928322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1343443831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 671721815 + 671721816.

It is an arithmetic number, because the mean of its divisors is an integer number (671721816).

Almost surely, 2^1343443631 is an apocalyptic number.

1343443631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1343443631 is an equidigital number, since it uses as much as digits as its factorization.

1343443631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 32.

The square root of 1343443631 is about 36653.0166698459. The cubic root of 1343443631 is about 1103.4173697843.

The spelling of 1343443631 in words is "one billion, three hundred forty-three million, four hundred forty-three thousand, six hundred thirty-one".