1338073779 has 16 divisors (see below), whose sum is σ = 2046730752. Its totient is φ = 761703168.

The previous prime is 1338073777. The next prime is 1338073823. The reversal of 1338073779 is 9773708331.

It is a happy number.

It is not a de Polignac number, because 1338073779 - 2¹ = 1338073777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1338073777) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115614 + ... + 126659.

It is an arithmetic number, because the mean of its divisors is an integer number (127920672).

Almost surely, 2^1338073779 is an apocalyptic number.

1338073779 is a deficient number, since it is larger than the sum of its proper divisors (708656973).

1338073779 is a wasteful number, since it uses less digits than its factorization.

1338073779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242546.

The product of its (nonzero) digits is 666792, while the sum is 48.

The square root of 1338073779 is about 36579.6907996774. The cubic root of 1338073779 is about 1101.9452573973.

The spelling of 1338073779 in words is "one billion, three hundred thirty-eight million, seventy-three thousand, seven hundred seventy-nine".