1338781903 has 4 divisors (see below), whose sum is σ = 1381968448. Its totient is φ = 1295595360.

The previous prime is 1338781901. The next prime is 1338781931. The reversal of 1338781903 is 3091878331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1338781903 - 2¹ = 1338781901 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1338781903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1338781901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21593226 + ... + 21593287.

It is an arithmetic number, because the mean of its divisors is an integer number (345492112).

Almost surely, 2^1338781903 is an apocalyptic number.

1338781903 is a deficient number, since it is larger than the sum of its proper divisors (43186545).

1338781903 is an equidigital number, since it uses as much as digits as its factorization.

1338781903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43186544.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 1338781903 is about 36589.3687155163. The cubic root of 1338781903 is about 1102.1396104755.

The spelling of 1338781903 in words is "one billion, three hundred thirty-eight million, seven hundred eighty-one thousand, nine hundred three".