13071643 has 6 divisors (see below), whose sum is σ = 14154684. Its totient is φ = 12065976.

The previous prime is 13071631. The next prime is 13071649. The reversal of 13071643 is 34617031.

It is not a de Polignac number, because 13071643 - 2⁹ = 13071131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13071649) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38505 + ... + 38842.

It is an arithmetic number, because the mean of its divisors is an integer number (2359114).

Almost surely, 2^13071643 is an apocalyptic number.

13071643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

13071643 is a deficient number, since it is larger than the sum of its proper divisors (1083041).

13071643 is an equidigital number, since it uses as much as digits as its factorization.

13071643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77373 (or 77360 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 13071643 is about 3615.4727215124. The cubic root of 13071643 is about 235.5646179006.

Adding to 13071643 its reverse (34617031), we get a palindrome (47688674).

The spelling of 13071643 in words is "thirteen million, seventy-one thousand, six hundred forty-three".