137320273 has 2 divisors, whose sum is σ = 137320274. Its totient is φ = 137320272.

The previous prime is 137320243. The next prime is 137320289. The reversal of 137320273 is 372023731.

137320273 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77845329 + 59474944 = 8823^2 + 7712^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137320273 is a prime.

It is not a weakly prime, because it can be changed into another prime (137320243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68660136 + 68660137.

It is an arithmetic number, because the mean of its divisors is an integer number (68660137).

Almost surely, 2^137320273 is an apocalyptic number.

It is an amenable number.

137320273 is a deficient number, since it is larger than the sum of its proper divisors (1).

137320273 is an equidigital number, since it uses as much as digits as its factorization.

137320273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5292, while the sum is 28.

The square root of 137320273 is about 11718.3733086124. The cubic root of 137320273 is about 515.9150765134.

The spelling of 137320273 in words is "one hundred thirty-seven million, three hundred twenty thousand, two hundred seventy-three".