384139493 has 4 divisors (see below), whose sum is σ = 384409740. Its totient is φ = 383869248.

The previous prime is 384139477. The next prime is 384139517. The reversal of 384139493 is 394931483.

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 130119649 + 254019844 = 11407^2 + 15938^2 .

It is a cyclic number.

It is not a de Polignac number, because 384139493 - 2⁴ = 384139477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384139403) 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, 132980 + ... + 135837.

It is an arithmetic number, because the mean of its divisors is an integer number (96102435).

Almost surely, 2^384139493 is an apocalyptic number.

It is an amenable number.

384139493 is a deficient number, since it is larger than the sum of its proper divisors (270247).

384139493 is a wasteful number, since it uses less digits than its factorization.

384139493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270246.

The product of its digits is 279936, while the sum is 44.

The square root of 384139493 is about 19599.4768552633. The cubic root of 384139493 is about 726.9362388399.

It can be divided in two parts, 3841 and 39493, that added together give a palindrome (43334).

The spelling of 384139493 in words is "three hundred eighty-four million, one hundred thirty-nine thousand, four hundred ninety-three".