1379191447 has 2 divisors, whose sum is σ = 1379191448. Its totient is φ = 1379191446.

The previous prime is 1379191441. The next prime is 1379191459. The reversal of 1379191447 is 7441919731.

It is a weak prime.

It is an emirp because it is prime and its reverse (7441919731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1379191447 - 2³ = 1379191439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1379191397 and 1379191406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1379191441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689595723 + 689595724.

It is an arithmetic number, because the mean of its divisors is an integer number (689595724).

Almost surely, 2^1379191447 is an apocalyptic number.

1379191447 is a deficient number, since it is larger than the sum of its proper divisors (1).

1379191447 is an equidigital number, since it uses as much as digits as its factorization.

1379191447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 46.

The square root of 1379191447 is about 37137.4668899213. The cubic root of 1379191447 is about 1113.1188015071.

The spelling of 1379191447 in words is "one billion, three hundred seventy-nine million, one hundred ninety-one thousand, four hundred forty-seven".