1338812899 has 4 divisors (see below), whose sum is σ = 1343753440. Its totient is φ = 1333872360.

The previous prime is 1338812887. The next prime is 1338812929. The reversal of 1338812899 is 9982188331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9982188331 = 1163 ⋅8583137.

It is a cyclic number.

It is not a de Polignac number, because 1338812899 - 2²⁵ = 1305258467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1338812999) 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, 2469864 + ... + 2470405.

It is an arithmetic number, because the mean of its divisors is an integer number (335938360).

Almost surely, 2^1338812899 is an apocalyptic number.

1338812899 is a deficient number, since it is larger than the sum of its proper divisors (4940541).

1338812899 is an equidigital number, since it uses as much as digits as its factorization.

1338812899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4940540.

The product of its digits is 746496, while the sum is 52.

The square root of 1338812899 is about 36589.7922787217. The cubic root of 1338812899 is about 1102.1481161317.

The spelling of 1338812899 in words is "one billion, three hundred thirty-eight million, eight hundred twelve thousand, eight hundred ninety-nine".