2138393 has 8 divisors (see below), whose sum is σ = 2265120. Its totient is φ = 2013120.

The previous prime is 2138387. The next prime is 2138399. The reversal of 2138393 is 3938312.

It is an interprime number because it is at equal distance from previous prime (2138387) and next prime (2138399).

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 2138393 - 2⁴ = 2138377 is a prime.

It is a d-powerful number, because it can be written as 2¹⁹ + 1 + 3⁴ + 8 + 3⁹ + 9 + 3¹³ .

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2138399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4346 + ... + 4812.

It is an arithmetic number, because the mean of its divisors is an integer number (283140).

2^2138393 is an apocalyptic number.

It is an amenable number.

2138393 is a deficient number, since it is larger than the sum of its proper divisors (126727).

2138393 is a wasteful number, since it uses less digits than its factorization.

2138393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727.

The product of its digits is 3888, while the sum is 29.

The square root of 2138393 is about 1462.3245193869. The cubic root of 2138393 is about 128.8336095629.

The spelling of 2138393 in words is "two million, one hundred thirty-eight thousand, three hundred ninety-three".