137117779 has 2 divisors, whose sum is σ = 137117780. Its totient is φ = 137117778.

The previous prime is 137117707. The next prime is 137117797. The reversal of 137117779 is 977711731.

Together with next prime (137117797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (977711731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 137117779 - 2¹¹ = 137115731 is a prime.

It is not a weakly prime, because it can be changed into another prime (137117879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68558889 + 68558890.

It is an arithmetic number, because the mean of its divisors is an integer number (68558890).

Almost surely, 2^137117779 is an apocalyptic number.

137117779 is a deficient number, since it is larger than the sum of its proper divisors (1).

137117779 is an equidigital number, since it uses as much as digits as its factorization.

137117779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64827, while the sum is 43.

The square root of 137117779 is about 11709.7300993661. The cubic root of 137117779 is about 515.6613603940.

The spelling of 137117779 in words is "one hundred thirty-seven million, one hundred seventeen thousand, seven hundred seventy-nine".