9137729 has 2 divisors, whose sum is σ = 9137730. Its totient is φ = 9137728.

The previous prime is 9137707. The next prime is 9137731. The reversal of 9137729 is 9277319.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8254129 + 883600 = 2873^2 + 940^2 .

It is a cyclic number.

It is not a de Polignac number, because 9137729 - 2⁸ = 9137473 is a prime.

Together with 9137731, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 9137692 and 9137701.

It is not a weakly prime, because it can be changed into another prime (9137759) 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, 4568864 + 4568865.

It is an arithmetic number, because the mean of its divisors is an integer number (4568865).

Almost surely, 2^9137729 is an apocalyptic number.

It is an amenable number.

9137729 is a deficient number, since it is larger than the sum of its proper divisors (1).

9137729 is an equidigital number, since it uses as much as digits as its factorization.

9137729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23814, while the sum is 38.

The square root of 9137729 is about 3022.8676782155. The cubic root of 9137729 is about 209.0640814466.

The spelling of 9137729 in words is "nine million, one hundred thirty-seven thousand, seven hundred twenty-nine".