38970921 has 8 divisors (see below), whose sum is σ = 56685024. Its totient is φ = 23618720.

The previous prime is 38970917. The next prime is 38970923. The reversal of 38970921 is 12907983.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 38970921 - 2² = 38970917 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38970921.

It is not an unprimeable number, because it can be changed into a prime (38970923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 590436 + ... + 590501.

It is an arithmetic number, because the mean of its divisors is an integer number (7085628).

Almost surely, 2^38970921 is an apocalyptic number.

It is an amenable number.

38970921 is a deficient number, since it is larger than the sum of its proper divisors (17714103).

38970921 is a wasteful number, since it uses less digits than its factorization.

38970921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180951.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 38970921 is about 6242.6693809620. The cubic root of 38970921 is about 339.0368386973.

The spelling of 38970921 in words is "thirty-eight million, nine hundred seventy thousand, nine hundred twenty-one".