1338941969 has 4 divisors (see below), whose sum is σ = 1367430144. Its totient is φ = 1310453796.

The previous prime is 1338941959. The next prime is 1338941971. The reversal of 1338941969 is 9691498331.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9691498331 = 197 ⋅49195423.

It is a cyclic number.

It is not a de Polignac number, because 1338941969 - 2⁸ = 1338941713 is a prime.

It is a super-2 number, since 2×1338941969² = 3585531192699193922, which contains 22 as substring.

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 1338941969.

It is not an unprimeable number, because it can be changed into a prime (1338941909) 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, 14244017 + ... + 14244110.

It is an arithmetic number, because the mean of its divisors is an integer number (341857536).

Almost surely, 2^1338941969 is an apocalyptic number.

It is an amenable number.

1338941969 is a deficient number, since it is larger than the sum of its proper divisors (28488175).

1338941969 is an equidigital number, since it uses as much as digits as its factorization.

1338941969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28488174.

The product of its digits is 1259712, while the sum is 53.

The square root of 1338941969 is about 36591.5559794879. Note that the first 3 decimals coincide. The cubic root of 1338941969 is about 1102.1835330015.

The spelling of 1338941969 in words is "one billion, three hundred thirty-eight million, nine hundred forty-one thousand, nine hundred sixty-nine".