1339702685 has 4 divisors (see below), whose sum is σ = 1607643228. Its totient is φ = 1071762144.

The previous prime is 1339702667. The next prime is 1339702687. The reversal of 1339702685 is 5862079331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5862079331 = 1753 ⋅3344027.

It can be written as a sum of positive squares in 2 ways, for example, as 519338521 + 820364164 = 22789^2 + 28642^2 .

It is a cyclic number.

It is not a de Polignac number, because 1339702685 - 2¹⁴ = 1339686301 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 (1339702687) 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, 133970264 + ... + 133970273.

It is an arithmetic number, because the mean of its divisors is an integer number (401910807).

Almost surely, 2^1339702685 is an apocalyptic number.

It is an amenable number.

1339702685 is a deficient number, since it is larger than the sum of its proper divisors (267940543).

1339702685 is an equidigital number, since it uses as much as digits as its factorization.

1339702685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267940542.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 1339702685 is about 36601.9491967299. The cubic root of 1339702685 is about 1102.3922276102.

The spelling of 1339702685 in words is "one billion, three hundred thirty-nine million, seven hundred two thousand, six hundred eighty-five".