1319785979 has 2 divisors, whose sum is σ = 1319785980. Its totient is φ = 1319785978.

The previous prime is 1319785921. The next prime is 1319785993. The reversal of 1319785979 is 9795879131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1319785979 - 2²⁰ = 1318737403 is a prime.

It is not a weakly prime, because it can be changed into another prime (1319785279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659892989 + 659892990.

It is an arithmetic number, because the mean of its divisors is an integer number (659892990).

Almost surely, 2^1319785979 is an apocalyptic number.

1319785979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1319785979 is an equidigital number, since it uses as much as digits as its factorization.

1319785979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4286520, while the sum is 59.

The square root of 1319785979 is about 36328.8587626972. The cubic root of 1319785979 is about 1096.9020212324.

The spelling of 1319785979 in words is "one billion, three hundred nineteen million, seven hundred eighty-five thousand, nine hundred seventy-nine".