1338073777 has 2 divisors, whose sum is σ = 1338073778. Its totient is φ = 1338073776.

The previous prime is 1338073747. The next prime is 1338073823. The reversal of 1338073777 is 7773708331.

It is an a-pointer prime, because the next prime (1338073823) can be obtained adding 1338073777 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1121513121 + 216560656 = 33489^2 + 14716^2 .

It is a cyclic number.

It is not a de Polignac number, because 1338073777 - 2¹¹ = 1338071729 is a prime.

It is not a weakly prime, because it can be changed into another prime (1338073747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669036888 + 669036889.

It is an arithmetic number, because the mean of its divisors is an integer number (669036889).

Almost surely, 2^1338073777 is an apocalyptic number.

It is an amenable number.

1338073777 is a deficient number, since it is larger than the sum of its proper divisors (1).

1338073777 is an equidigital number, since it uses as much as digits as its factorization.

1338073777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 518616, while the sum is 46.

The square root of 1338073777 is about 36579.6907723398. The cubic root of 1338073777 is about 1101.9452568483.

The spelling of 1338073777 in words is "one billion, three hundred thirty-eight million, seventy-three thousand, seven hundred seventy-seven".