1338754921 has 9 divisors (see below), whose sum is σ = 1557625149. Its totient is φ = 1147284684.

The previous prime is 1338754903. The next prime is 1338755039. The reversal of 1338754921 is 1294578331.

The square root of 1338754921 is 36589.

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

It is not a de Polignac number, because 1338754921 - 2²³ = 1330366313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1338754121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 253510 + ... + 258736.

It is an arithmetic number, because the mean of its divisors is an integer number (173069461).

Almost surely, 2^1338754921 is an apocalyptic number.

1338754921 is the 36589-th square number.

1338754921 is the 18295-th centered octagonal number.

It is an amenable number.

1338754921 is a deficient number, since it is larger than the sum of its proper divisors (218870228).

1338754921 is an frugal number, since it uses more digits than its factorization.

1338754921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10468 (or 5234 counting only the distinct ones).

The product of its digits is 181440, while the sum is 43.

The cubic root of 1338754921 is about 1102.1322061999.

The spelling of 1338754921 in words is "one billion, three hundred thirty-eight million, seven hundred fifty-four thousand, nine hundred twenty-one".