1396418779 has 4 divisors (see below), whose sum is σ = 1595907184. Its totient is φ = 1196930376.

The previous prime is 1396418767. The next prime is 1396418783. The reversal of 1396418779 is 9778146931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1396418779 - 2¹⁵ = 1396386011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1396418279) 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, 99744192 + ... + 99744205.

It is an arithmetic number, because the mean of its divisors is an integer number (398976796).

Almost surely, 2^1396418779 is an apocalyptic number.

1396418779 is a deficient number, since it is larger than the sum of its proper divisors (199488405).

1396418779 is an equidigital number, since it uses as much as digits as its factorization.

1396418779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199488404.

The product of its digits is 2286144, while the sum is 55.

The square root of 1396418779 is about 37368.6871457909. The cubic root of 1396418779 is about 1117.7342532172.

The spelling of 1396418779 in words is "one billion, three hundred ninety-six million, four hundred eighteen thousand, seven hundred seventy-nine".