38921371 has 4 divisors (see below), whose sum is σ = 38943072. Its totient is φ = 38899672.

The previous prime is 38921369. The next prime is 38921383. The reversal of 38921371 is 17312983.

38921371 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 38921371 - 2¹ = 38921369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38925371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7891 + ... + 11836.

It is an arithmetic number, because the mean of its divisors is an integer number (9735768).

Almost surely, 2^38921371 is an apocalyptic number.

38921371 is the 3946-th heptagonal number.

38921371 is a deficient number, since it is larger than the sum of its proper divisors (21701).

38921371 is a wasteful number, since it uses less digits than its factorization.

38921371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21700.

The product of its digits is 9072, while the sum is 34.

The square root of 38921371 is about 6238.6994638306. The cubic root of 38921371 is about 338.8930870671.

The spelling of 38921371 in words is "thirty-eight million, nine hundred twenty-one thousand, three hundred seventy-one".