38981513 has 4 divisors (see below), whose sum is σ = 39177600. Its totient is φ = 38785428.

The previous prime is 38981479. The next prime is 38981519. The reversal of 38981513 is 31518983.

38981513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31518983 = 4253 ⋅7411.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38981513 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (38981519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97745 + ... + 98142.

It is an arithmetic number, because the mean of its divisors is an integer number (9794400).

Almost surely, 2^38981513 is an apocalyptic number.

It is an amenable number.

38981513 is a deficient number, since it is larger than the sum of its proper divisors (196087).

38981513 is a wasteful number, since it uses less digits than its factorization.

38981513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196086.

The product of its digits is 25920, while the sum is 38.

The square root of 38981513 is about 6243.5176783605. The cubic root of 38981513 is about 339.0675517932.

The spelling of 38981513 in words is "thirty-eight million, nine hundred eighty-one thousand, five hundred thirteen".