1338941959 has 2 divisors, whose sum is σ = 1338941960. Its totient is φ = 1338941958.

The previous prime is 1338941957. The next prime is 1338941971. The reversal of 1338941959 is 9591498331.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (9591498331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1338941959 - 2¹ = 1338941957 is a prime.

Together with 1338941957, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1338941957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669470979 + 669470980.

It is an arithmetic number, because the mean of its divisors is an integer number (669470980).

Almost surely, 2^1338941959 is an apocalyptic number.

1338941959 is a deficient number, since it is larger than the sum of its proper divisors (1).

1338941959 is an equidigital number, since it uses as much as digits as its factorization.

1338941959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1049760, while the sum is 52.

The square root of 1338941959 is about 36591.5558428444. Note that the first 3 decimals coincide. The cubic root of 1338941959 is about 1102.1835302575.

The spelling of 1338941959 in words is "one billion, three hundred thirty-eight million, nine hundred forty-one thousand, nine hundred fifty-nine".