38729443 has 2 divisors, whose sum is σ = 38729444. Its totient is φ = 38729442.

The previous prime is 38729441. The next prime is 38729473. The reversal of 38729443 is 34492783.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38729443 - 2¹ = 38729441 is a prime.

Together with 38729441, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 38729396 and 38729405.

It is not a weakly prime, because it can be changed into another prime (38729441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19364721 + 19364722.

It is an arithmetic number, because the mean of its divisors is an integer number (19364722).

Almost surely, 2^38729443 is an apocalyptic number.

38729443 is a deficient number, since it is larger than the sum of its proper divisors (1).

38729443 is an equidigital number, since it uses as much as digits as its factorization.

38729443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 40.

The square root of 38729443 is about 6223.2984019730. The cubic root of 38729443 is about 338.3351221456.

The spelling of 38729443 in words is "thirty-eight million, seven hundred twenty-nine thousand, four hundred forty-three".