137172975281 has 2 divisors, whose sum is σ = 137172975282. Its totient is φ = 137172975280.

The previous prime is 137172975271. The next prime is 137172975311. The reversal of 137172975281 is 182579271731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111085557025 + 26087418256 = 333295^2 + 161516^2 .

It is an emirp because it is prime and its reverse (182579271731) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137172975281 is a prime.

It is a super-2 number, since 2×137172975281² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (137172975211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68586487640 + 68586487641.

It is an arithmetic number, because the mean of its divisors is an integer number (68586487641).

Almost surely, 2^137172975281 is an apocalyptic number.

It is an amenable number.

137172975281 is a deficient number, since it is larger than the sum of its proper divisors (1).

137172975281 is an equidigital number, since it uses as much as digits as its factorization.

137172975281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1481760, while the sum is 53.

The spelling of 137172975281 in words is "one hundred thirty-seven billion, one hundred seventy-two million, nine hundred seventy-five thousand, two hundred eighty-one".