97550309 has 2 divisors, whose sum is σ = 97550310. Its totient is φ = 97550308.

The previous prime is 97550303. The next prime is 97550353. The reversal of 97550309 is 90305579.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85840225 + 11710084 = 9265^2 + 3422^2 .

It is a cyclic number.

It is not a de Polignac number, because 97550309 - 2¹⁶ = 97484773 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97550303) 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, 48775154 + 48775155.

It is an arithmetic number, because the mean of its divisors is an integer number (48775155).

Almost surely, 2^97550309 is an apocalyptic number.

It is an amenable number.

97550309 is a deficient number, since it is larger than the sum of its proper divisors (1).

97550309 is an equidigital number, since it uses as much as digits as its factorization.

97550309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42525, while the sum is 38.

The square root of 97550309 is about 9876.7559957711. The cubic root of 97550309 is about 460.3373533515.

The spelling of 97550309 in words is "ninety-seven million, five hundred fifty thousand, three hundred nine".