137679319909 has 2 divisors, whose sum is σ = 137679319910. Its totient is φ = 137679319908.

The previous prime is 137679319889. The next prime is 137679319931. The reversal of 137679319909 is 909913976731.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129381931809 + 8297388100 = 359697^2 + 91090^2 .

It is an emirp because it is prime and its reverse (909913976731) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137679319909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137679319409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68839659954 + 68839659955.

It is an arithmetic number, because the mean of its divisors is an integer number (68839659955).

Almost surely, 2^137679319909 is an apocalyptic number.

It is an amenable number.

137679319909 is a deficient number, since it is larger than the sum of its proper divisors (1).

137679319909 is an equidigital number, since it uses as much as digits as its factorization.

137679319909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17360406, while the sum is 64.

The spelling of 137679319909 in words is "one hundred thirty-seven billion, six hundred seventy-nine million, three hundred nineteen thousand, nine hundred nine".