1379739 has 4 divisors (see below), whose sum is σ = 1839656. Its totient is φ = 919824.

The previous prime is 1379699. The next prime is 1379753. The reversal of 1379739 is 9379731.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1379739 - 2¹⁵ = 1346971 is a prime.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1379697 and 1379706.

It is not an unprimeable number, because it can be changed into a prime (1379239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 229954 + ... + 229959.

It is an arithmetic number, because the mean of its divisors is an integer number (459914).

2^1379739 is an apocalyptic number.

1379739 is a deficient number, since it is larger than the sum of its proper divisors (459917).

1379739 is an equidigital number, since it uses as much as digits as its factorization.

1379739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459916.

The product of its digits is 35721, while the sum is 39.

The square root of 1379739 is about 1174.6229182167. The cubic root of 1379739 is about 111.3266088504.

The spelling of 1379739 in words is "one million, three hundred seventy-nine thousand, seven hundred thirty-nine".