38913121 has 8 divisors (see below), whose sum is σ = 44112320. Its totient is φ = 34029072.

The previous prime is 38913113. The next prime is 38913137. The reversal of 38913121 is 12131983.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 38913121 - 2³ = 38913113 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 38913121.

It is not an unprimeable number, because it can be changed into a prime (38913191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78525 + ... + 79018.

It is an arithmetic number, because the mean of its divisors is an integer number (5514040).

Almost surely, 2^38913121 is an apocalyptic number.

It is an amenable number.

38913121 is a deficient number, since it is larger than the sum of its proper divisors (5199199).

38913121 is a wasteful number, since it uses less digits than its factorization.

38913121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157575.

The product of its digits is 1296, while the sum is 28.

The square root of 38913121 is about 6238.0382332910. The cubic root of 38913121 is about 338.8691407924.

The spelling of 38913121 in words is "thirty-eight million, nine hundred thirteen thousand, one hundred twenty-one".