1338136361 has 4 divisors (see below), whose sum is σ = 1356983424. Its totient is φ = 1319289300.

The previous prime is 1338136333. The next prime is 1338136363. The reversal of 1338136361 is 1636318331.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1338136361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1338136363) 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, 9423425 + ... + 9423566.

It is an arithmetic number, because the mean of its divisors is an integer number (339245856).

Almost surely, 2^1338136361 is an apocalyptic number.

It is an amenable number.

1338136361 is a deficient number, since it is larger than the sum of its proper divisors (18847063).

1338136361 is an equidigital number, since it uses as much as digits as its factorization.

1338136361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18847062.

The product of its digits is 23328, while the sum is 35.

The square root of 1338136361 is about 36580.5462097000. The cubic root of 1338136361 is about 1101.9624365355.

The spelling of 1338136361 in words is "one billion, three hundred thirty-eight million, one hundred thirty-six thousand, three hundred sixty-one".