38138713 has 4 divisors (see below), whose sum is σ = 38175460. Its totient is φ = 38101968.

The previous prime is 38138707. The next prime is 38138717. The reversal of 38138713 is 31783183.

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 22353984 + 15784729 = 4728^2 + 3973^2 .

It is a cyclic number.

It is not a de Polignac number, because 38138713 - 2⁹ = 38138201 is a prime.

It is a super-2 number, since 2×38138713² = 2909122858592738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38138717) 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, 16770 + ... + 18907.

It is an arithmetic number, because the mean of its divisors is an integer number (9543865).

Almost surely, 2^38138713 is an apocalyptic number.

It is an amenable number.

38138713 is a deficient number, since it is larger than the sum of its proper divisors (36747).

38138713 is a wasteful number, since it uses less digits than its factorization.

38138713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36746.

The product of its digits is 12096, while the sum is 34.

The square root of 38138713 is about 6175.6548640610. The cubic root of 38138713 is about 336.6061226073.

The spelling of 38138713 in words is "thirty-eight million, one hundred thirty-eight thousand, seven hundred thirteen".