1338979 has 2 divisors, whose sum is σ = 1338980. Its totient is φ = 1338978.

The previous prime is 1338941. The next prime is 1339001. The reversal of 1338979 is 9798331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1338979 - 2⁷ = 1338851 is a prime.

It is not a weakly prime, because it can be changed into another prime (1338479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669489 + 669490.

It is an arithmetic number, because the mean of its divisors is an integer number (669490).

2^1338979 is an apocalyptic number.

1338979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1338979 is an equidigital number, since it uses as much as digits as its factorization.

1338979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 40.

The square root of 1338979 is about 1157.1426014109. The cubic root of 1338979 is about 110.2193693905.

The spelling of 1338979 in words is "one million, three hundred thirty-eight thousand, nine hundred seventy-nine".