1338739 has 4 divisors (see below), whose sum is σ = 1347424. Its totient is φ = 1330056.

The previous prime is 1338737. The next prime is 1338749. The reversal of 1338739 is 9378331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9378331 = 397 ⋅23623.

It is a cyclic number.

It is not a de Polignac number, because 1338739 - 2¹ = 1338737 is a prime.

It is a super-2 number, since 2×1338739² = 3584444220242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1338731) 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, 4107 + ... + 4420.

It is an arithmetic number, because the mean of its divisors is an integer number (336856).

2^1338739 is an apocalyptic number.

1338739 is a deficient number, since it is larger than the sum of its proper divisors (8685).

1338739 is an equidigital number, since it uses as much as digits as its factorization.

1338739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8684.

The product of its digits is 13608, while the sum is 34.

The square root of 1338739 is about 1157.0388930369. The cubic root of 1338739 is about 110.2127837186.

The spelling of 1338739 in words is "one million, three hundred thirty-eight thousand, seven hundred thirty-nine".