38912513 has 4 divisors (see below), whose sum is σ = 40960560. Its totient is φ = 36864468.

The previous prime is 38912509. The next prime is 38912543. The reversal of 38912513 is 31521983.

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: 31521983 = 23 ⋅1370521.

It is a cyclic number.

It is not a de Polignac number, because 38912513 - 2² = 38912509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38912513.

It is not an unprimeable number, because it can be changed into a prime (38912543) 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, 1023995 + ... + 1024032.

It is an arithmetic number, because the mean of its divisors is an integer number (10240140).

Almost surely, 2^38912513 is an apocalyptic number.

It is an amenable number.

38912513 is a deficient number, since it is larger than the sum of its proper divisors (2048047).

38912513 is a wasteful number, since it uses less digits than its factorization.

38912513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2048046.

The product of its digits is 6480, while the sum is 32.

The square root of 38912513 is about 6237.9894998309. The cubic root of 38912513 is about 338.8673758906.

The spelling of 38912513 in words is "thirty-eight million, nine hundred twelve thousand, five hundred thirteen".