38920517 has 4 divisors (see below), whose sum is σ = 38950476. Its totient is φ = 38890560.

The previous prime is 38920513. The next prime is 38920529. The reversal of 38920517 is 71502983.

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 26204161 + 12716356 = 5119^2 + 3566^2 .

It is a cyclic number.

It is not a de Polignac number, because 38920517 - 2² = 38920513 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 (38920513) 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 3 ways as a sum of consecutive naturals, for example, 12938 + ... + 15659.

It is an arithmetic number, because the mean of its divisors is an integer number (9737619).

Almost surely, 2^38920517 is an apocalyptic number.

It is an amenable number.

38920517 is a deficient number, since it is larger than the sum of its proper divisors (29959).

38920517 is a wasteful number, since it uses less digits than its factorization.

38920517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29958.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 38920517 is about 6238.6310197030. The cubic root of 38920517 is about 338.8906084219.

The spelling of 38920517 in words is "thirty-eight million, nine hundred twenty thousand, five hundred seventeen".