1339639 has 8 divisors (see below), whose sum is σ = 1539968. Its totient is φ = 1141560.

The previous prime is 1339631. The next prime is 1339643. The reversal of 1339639 is 9369331.

It is a happy number.

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

It is not a de Polignac number, because 1339639 - 2³ = 1339631 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 (1339631) 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, 1024 + ... + 1930.

It is an arithmetic number, because the mean of its divisors is an integer number (192496).

2^1339639 is an apocalyptic number.

1339639 is a deficient number, since it is larger than the sum of its proper divisors (200329).

1339639 is an equidigital number, since it uses as much as digits as its factorization.

1339639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125.

The product of its digits is 13122, while the sum is 34.

The square root of 1339639 is about 1157.4277515249. The cubic root of 1339639 is about 110.2374759316.

The spelling of 1339639 in words is "one million, three hundred thirty-nine thousand, six hundred thirty-nine".