384739913 has 4 divisors (see below), whose sum is σ = 385969428. Its totient is φ = 383510400.

The previous prime is 384739891. The next prime is 384739919. The reversal of 384739913 is 319937483.

It is a happy number.

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 67436944 + 317302969 = 8212^2 + 17813^2 .

It is a cyclic number.

It is not a de Polignac number, because 384739913 - 2⁸ = 384739657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (384739919) 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, 614288 + ... + 614913.

It is an arithmetic number, because the mean of its divisors is an integer number (96492357).

Almost surely, 2^384739913 is an apocalyptic number.

It is an amenable number.

384739913 is a deficient number, since it is larger than the sum of its proper divisors (1229515).

384739913 is a wasteful number, since it uses less digits than its factorization.

384739913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229514.

The product of its digits is 489888, while the sum is 47.

The square root of 384739913 is about 19614.7881201914. The cubic root of 384739913 is about 727.3147817552.

The spelling of 384739913 in words is "three hundred eighty-four million, seven hundred thirty-nine thousand, nine hundred thirteen".