97169309 has 2 divisors, whose sum is σ = 97169310. Its totient is φ = 97169308.

The previous prime is 97169291. The next prime is 97169311. The reversal of 97169309 is 90396179.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95981209 + 1188100 = 9797^2 + 1090^2 .

It is an emirp because it is prime and its reverse (90396179) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97169309 - 2¹² = 97165213 is a prime.

It is a super-2 number, since 2×97169309² = 18883749223074962, which contains 22 as substring.

Together with 97169311, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 97169309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97169329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48584654 + 48584655.

It is an arithmetic number, because the mean of its divisors is an integer number (48584655).

Almost surely, 2^97169309 is an apocalyptic number.

It is an amenable number.

97169309 is a deficient number, since it is larger than the sum of its proper divisors (1).

97169309 is an equidigital number, since it uses as much as digits as its factorization.

97169309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 97169309 is about 9857.4494165580. The cubic root of 97169309 is about 459.7372617436.

The spelling of 97169309 in words is "ninety-seven million, one hundred sixty-nine thousand, three hundred nine".