1379049649 has 2 divisors, whose sum is σ = 1379049650. Its totient is φ = 1379049648.

The previous prime is 1379049647. The next prime is 1379049653. The reversal of 1379049649 is 9469409731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 696168225 + 682881424 = 26385^2 + 26132^2 .

It is an emirp because it is prime and its reverse (9469409731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1379049649 - 2¹ = 1379049647 is a prime.

Together with 1379049647, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1379049596 and 1379049605.

It is not a weakly prime, because it can be changed into another prime (1379049641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689524824 + 689524825.

It is an arithmetic number, because the mean of its divisors is an integer number (689524825).

Almost surely, 2^1379049649 is an apocalyptic number.

It is an amenable number.

1379049649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1379049649 is an equidigital number, since it uses as much as digits as its factorization.

1379049649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1469664, while the sum is 52.

The square root of 1379049649 is about 37135.5577445661. The cubic root of 1379049649 is about 1113.0806527232.

The spelling of 1379049649 in words is "one billion, three hundred seventy-nine million, forty-nine thousand, six hundred forty-nine".