1338686837 has 4 divisors (see below), whose sum is σ = 1355632320. Its totient is φ = 1321741356.

The previous prime is 1338686827. The next prime is 1338686849. The reversal of 1338686837 is 7386868331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7386868331 = 1451 ⋅5090881.

It is a cyclic number.

It is not a de Polignac number, because 1338686837 - 2⁸ = 1338686581 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 (1338686827) 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, 8472623 + ... + 8472780.

It is an arithmetic number, because the mean of its divisors is an integer number (338908080).

Almost surely, 2^1338686837 is an apocalyptic number.

It is an amenable number.

1338686837 is a deficient number, since it is larger than the sum of its proper divisors (16945483).

1338686837 is an equidigital number, since it uses as much as digits as its factorization.

1338686837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16945482.

The product of its digits is 3483648, while the sum is 53.

The square root of 1338686837 is about 36588.0695992560. The cubic root of 1338686837 is about 1102.1135224612.

The spelling of 1338686837 in words is "one billion, three hundred thirty-eight million, six hundred eighty-six thousand, eight hundred thirty-seven".