38962921 has 4 divisors (see below), whose sum is σ = 40306500. Its totient is φ = 37619344.

The previous prime is 38962907. The next prime is 38962927. The reversal of 38962921 is 12926983.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 31866025 + 7096896 = 5645^2 + 2664^2 .

It is a cyclic number.

It is not a de Polignac number, because 38962921 - 2¹⁹ = 38438633 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38962927) 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, 671746 + ... + 671803.

It is an arithmetic number, because the mean of its divisors is an integer number (10076625).

Almost surely, 2^38962921 is an apocalyptic number.

It is an amenable number.

38962921 is a deficient number, since it is larger than the sum of its proper divisors (1343579).

38962921 is a wasteful number, since it uses less digits than its factorization.

38962921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343578.

The product of its digits is 46656, while the sum is 40.

The square root of 38962921 is about 6242.0285965381. The cubic root of 38962921 is about 339.0136378058.

The spelling of 38962921 in words is "thirty-eight million, nine hundred sixty-two thousand, nine hundred twenty-one".