1338932779 has 2 divisors, whose sum is σ = 1338932780. Its totient is φ = 1338932778.

The previous prime is 1338932759. The next prime is 1338932789. The reversal of 1338932779 is 9772398331.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1338932779 - 2⁵ = 1338932747 is a prime.

It is not a weakly prime, because it can be changed into another prime (1338932719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669466389 + 669466390.

It is an arithmetic number, because the mean of its divisors is an integer number (669466390).

Almost surely, 2^1338932779 is an apocalyptic number.

1338932779 is a deficient number, since it is larger than the sum of its proper divisors (1).

1338932779 is an equidigital number, since it uses as much as digits as its factorization.

1338932779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1714608, while the sum is 52.

The square root of 1338932779 is about 36591.4304038528. The cubic root of 1338932779 is about 1102.1810113363.

The spelling of 1338932779 in words is "one billion, three hundred thirty-eight million, nine hundred thirty-two thousand, seven hundred seventy-nine".