1339860649 has 2 divisors, whose sum is σ = 1339860650. Its totient is φ = 1339860648.

The previous prime is 1339860629. The next prime is 1339860671. The reversal of 1339860649 is 9460689331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1086032025 + 253828624 = 32955^2 + 15932^2 .

It is an emirp because it is prime and its reverse (9460689331) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1339860649 is a prime.

It is not a weakly prime, because it can be changed into another prime (1339860629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669930324 + 669930325.

It is an arithmetic number, because the mean of its divisors is an integer number (669930325).

Almost surely, 2^1339860649 is an apocalyptic number.

It is an amenable number.

1339860649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1339860649 is an equidigital number, since it uses as much as digits as its factorization.

1339860649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 839808, while the sum is 49.

The square root of 1339860649 is about 36604.1069963467. The cubic root of 1339860649 is about 1102.4355535024.

It can be divided in two parts, 13398 and 60649, that added together give a palindrome (74047).

The spelling of 1339860649 in words is "one billion, three hundred thirty-nine million, eight hundred sixty thousand, six hundred forty-nine".