38969921 has 8 divisors (see below), whose sum is σ = 39350784. Its totient is φ = 38591280.

The previous prime is 38969897. The next prime is 38969927. The reversal of 38969921 is 12996983.

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 38969921 - 2⁶ = 38969857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38969927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70970 + ... + 71516.

It is an arithmetic number, because the mean of its divisors is an integer number (4918848).

Almost surely, 2^38969921 is an apocalyptic number.

It is an amenable number.

38969921 is a deficient number, since it is larger than the sum of its proper divisors (380863).

38969921 is a wasteful number, since it uses less digits than its factorization.

38969921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111.

The product of its digits is 209952, while the sum is 47.

The square root of 38969921 is about 6242.5892865060. The cubic root of 38969921 is about 339.0339387595.

The spelling of 38969921 in words is "thirty-eight million, nine hundred sixty-nine thousand, nine hundred twenty-one".