731136137 has 2 divisors, whose sum is σ = 731136138. Its totient is φ = 731136136.

The previous prime is 731136053. The next prime is 731136151. The reversal of 731136137 is 731631137.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 619960201 + 111175936 = 24899^2 + 10544^2 .

It is an emirp because it is prime and its reverse (731631137) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 731136137 - 2¹⁰ = 731135113 is a prime.

It is not a weakly prime, because it can be changed into another prime (731136037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365568068 + 365568069.

It is an arithmetic number, because the mean of its divisors is an integer number (365568069).

Almost surely, 2^731136137 is an apocalyptic number.

It is an amenable number.

731136137 is a deficient number, since it is larger than the sum of its proper divisors (1).

731136137 is an equidigital number, since it uses as much as digits as its factorization.

731136137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7938, while the sum is 32.

The square root of 731136137 is about 27039.5291564036. The cubic root of 731136137 is about 900.8782114951.

The spelling of 731136137 in words is "seven hundred thirty-one million, one hundred thirty-six thousand, one hundred thirty-seven".