2138397 has 8 divisors (see below), whose sum is σ = 2869344. Its totient is φ = 1416528.

The previous prime is 2138387. The next prime is 2138399. The reversal of 2138397 is 7938312.

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

It is not a de Polignac number, because 2138397 - 2¹⁴ = 2122013 is a prime.

2138397 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138399) 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, 1698 + ... + 2675.

It is an arithmetic number, because the mean of its divisors is an integer number (358668).

2^2138397 is an apocalyptic number.

It is an amenable number.

2138397 is a deficient number, since it is larger than the sum of its proper divisors (730947).

2138397 is a wasteful number, since it uses less digits than its factorization.

2138397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4539.

The product of its digits is 9072, while the sum is 33.

The square root of 2138397 is about 1462.3258870717. The cubic root of 2138397 is about 128.8336898934.

The spelling of 2138397 in words is "two million, one hundred thirty-eight thousand, three hundred ninety-seven".