38043947 has 4 divisors (see below), whose sum is σ = 40046280. Its totient is φ = 36041616.

The previous prime is 38043937. The next prime is 38043959. The reversal of 38043947 is 74934083.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 38043947 - 2¹⁶ = 37978411 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38043947.

It is not an unprimeable number, because it can be changed into a prime (38043937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1001138 + ... + 1001175.

It is an arithmetic number, because the mean of its divisors is an integer number (10011570).

Almost surely, 2^38043947 is an apocalyptic number.

38043947 is a deficient number, since it is larger than the sum of its proper divisors (2002333).

38043947 is a wasteful number, since it uses less digits than its factorization.

38043947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2002332.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 38043947 is about 6167.9775453547. The cubic root of 38043947 is about 336.3270949015.

The spelling of 38043947 in words is "thirty-eight million, forty-three thousand, nine hundred forty-seven".