1338608569 has 3 divisors (see below), whose sum is σ = 1338645157. Its totient is φ = 1338571982.

The previous prime is 1338608483. The next prime is 1338608573. The reversal of 1338608569 is 9658068331.

The square root of 1338608569 is 36587.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1338608569 - 2¹³ = 1338600377 is a prime.

It is a super-2 number, since 2×1338608569² = 3583745802000455522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1338608069) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 18294 + ... + 54880.

Almost surely, 2^1338608569 is an apocalyptic number.

1338608569 is the 36587-th square number.

1338608569 is the 18294-th centered octagonal number.

It is an amenable number.

1338608569 is a deficient number, since it is larger than the sum of its proper divisors (36588).

1338608569 is an frugal number, since it uses more digits than its factorization.

1338608569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73174 (or 36587 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 49.

The cubic root of 1338608569 is about 1102.0920432275.

Multiplying 1338608569 by its sum of digits (49), we get a square (65591819881 = 256109²).

The spelling of 1338608569 in words is "one billion, three hundred thirty-eight million, six hundred eight thousand, five hundred sixty-nine".