38664397 has 4 divisors (see below), whose sum is σ = 38682076. Its totient is φ = 38646720.

The previous prime is 38664389. The next prime is 38664407. The reversal of 38664397 is 79346683.

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 12152196 + 26512201 = 3486^2 + 5149^2 .

It is a cyclic number.

It is not a de Polignac number, because 38664397 - 2³ = 38664389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38664317) 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, 5004 + ... + 10117.

It is an arithmetic number, because the mean of its divisors is an integer number (9670519).

Almost surely, 2^38664397 is an apocalyptic number.

It is an amenable number.

38664397 is a deficient number, since it is larger than the sum of its proper divisors (17679).

38664397 is a wasteful number, since it uses less digits than its factorization.

38664397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17678.

The product of its digits is 653184, while the sum is 46.

The square root of 38664397 is about 6218.0701990248. The cubic root of 38664397 is about 338.1456050187.

The spelling of 38664397 in words is "thirty-eight million, six hundred sixty-four thousand, three hundred ninety-seven".