1338877019 has 4 divisors (see below), whose sum is σ = 1339740696. Its totient is φ = 1338013344.

The previous prime is 1338876991. The next prime is 1338877063. The reversal of 1338877019 is 9107788331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9107788331 = 23 ⋅395990797.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1338877019 is a prime.

It is a super-2 number, since 2×1338877019² = 3585183344012652722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1338777019) 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, 429509 + ... + 432614.

It is an arithmetic number, because the mean of its divisors is an integer number (334935174).

Almost surely, 2^1338877019 is an apocalyptic number.

1338877019 is a deficient number, since it is larger than the sum of its proper divisors (863677).

1338877019 is an equidigital number, since it uses as much as digits as its factorization.

1338877019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863676.

The product of its (nonzero) digits is 254016, while the sum is 47.

The square root of 1338877019 is about 36590.6684688870. The cubic root of 1338877019 is about 1102.1657109749.

The spelling of 1338877019 in words is "one billion, three hundred thirty-eight million, eight hundred seventy-seven thousand, nineteen".