137873173 has 2 divisors, whose sum is σ = 137873174. Its totient is φ = 137873172.

The previous prime is 137873123. The next prime is 137873189. The reversal of 137873173 is 371378731.

137873173 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., 131836324 + 6036849 = 11482^2 + 2457^2 .

It is a cyclic number.

It is not a de Polignac number, because 137873173 - 2⁹ = 137872661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137873123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68936586 + 68936587.

It is an arithmetic number, because the mean of its divisors is an integer number (68936587).

Almost surely, 2^137873173 is an apocalyptic number.

It is an amenable number.

137873173 is a deficient number, since it is larger than the sum of its proper divisors (1).

137873173 is an equidigital number, since it uses as much as digits as its factorization.

137873173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 74088, while the sum is 40.

The square root of 137873173 is about 11741.9407680332. The cubic root of 137873173 is about 516.6065681513.

The spelling of 137873173 in words is "one hundred thirty-seven million, eight hundred seventy-three thousand, one hundred seventy-three".