137895921161 has 2 divisors, whose sum is σ = 137895921162. Its totient is φ = 137895921160.

The previous prime is 137895921103. The next prime is 137895921167. The reversal of 137895921161 is 161129598731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124560290761 + 13335630400 = 352931^2 + 115480^2 .

It is an emirp because it is prime and its reverse (161129598731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 137895921161 - 2¹⁰ = 137895920137 is a prime.

It is not a weakly prime, because it can be changed into another prime (137895921167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68947960580 + 68947960581.

It is an arithmetic number, because the mean of its divisors is an integer number (68947960581).

Almost surely, 2^137895921161 is an apocalyptic number.

It is an amenable number.

137895921161 is a deficient number, since it is larger than the sum of its proper divisors (1).

137895921161 is an equidigital number, since it uses as much as digits as its factorization.

137895921161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 53.

The spelling of 137895921161 in words is "one hundred thirty-seven billion, eight hundred ninety-five million, nine hundred twenty-one thousand, one hundred sixty-one".