1318741779 has 4 divisors (see below), whose sum is σ = 1758322376. Its totient is φ = 879161184.

The previous prime is 1318741763. The next prime is 1318741783. The reversal of 1318741779 is 9771478131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9771478131 = 3 ⋅3257159377.

It is not a de Polignac number, because 1318741779 - 2⁴ = 1318741763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1318741079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219790294 + ... + 219790299.

It is an arithmetic number, because the mean of its divisors is an integer number (439580594).

Almost surely, 2^1318741779 is an apocalyptic number.

1318741779 is a deficient number, since it is larger than the sum of its proper divisors (439580597).

1318741779 is an equidigital number, since it uses as much as digits as its factorization.

1318741779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439580596.

The product of its digits is 296352, while the sum is 48.

The square root of 1318741779 is about 36314.4844242624. The cubic root of 1318741779 is about 1096.6126593425.

The spelling of 1318741779 in words is "one billion, three hundred eighteen million, seven hundred forty-one thousand, seven hundred seventy-nine".