97209405 has 12 divisors (see below), whose sum is σ = 168496380. Its totient is φ = 51844992.

The previous prime is 97209389. The next prime is 97209407. The reversal of 97209405 is 50490279.

It can be written as a sum of positive squares in 2 ways, for example, as 33385284 + 63824121 = 5778^2 + 7989^2 .

It is not a de Polignac number, because 97209405 - 2⁴ = 97209389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 97209405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97209407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1080060 + ... + 1080149.

It is an arithmetic number, because the mean of its divisors is an integer number (14041365).

Almost surely, 2^97209405 is an apocalyptic number.

It is an amenable number.

97209405 is a deficient number, since it is larger than the sum of its proper divisors (71286975).

97209405 is a wasteful number, since it uses less digits than its factorization.

97209405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2160220 (or 2160217 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 97209405 is about 9859.4829986161. The cubic root of 97209405 is about 459.8004884645.

The spelling of 97209405 in words is "ninety-seven million, two hundred nine thousand, four hundred five".