97229729 has 2 divisors, whose sum is σ = 97229730. Its totient is φ = 97229728.

The previous prime is 97229711. The next prime is 97229731. The reversal of 97229729 is 92792279.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80640400 + 16589329 = 8980^2 + 4073^2 .

It is an emirp because it is prime and its reverse (92792279) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97229729 - 2¹² = 97225633 is a prime.

Together with 97229731, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (97229789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48614864 + 48614865.

It is an arithmetic number, because the mean of its divisors is an integer number (48614865).

Almost surely, 2^97229729 is an apocalyptic number.

It is an amenable number.

97229729 is a deficient number, since it is larger than the sum of its proper divisors (1).

97229729 is an equidigital number, since it uses as much as digits as its factorization.

97229729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 285768, while the sum is 47.

The square root of 97229729 is about 9860.5136275957. The cubic root of 97229729 is about 459.8325304051.

The spelling of 97229729 in words is "ninety-seven million, two hundred twenty-nine thousand, seven hundred twenty-nine".