97200309 has 4 divisors (see below), whose sum is σ = 129600416. Its totient is φ = 64800204.

The previous prime is 97200293. The next prime is 97200343. The reversal of 97200309 is 90300279.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 97200309 - 2⁴ = 97200293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97200109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16200049 + ... + 16200054.

It is an arithmetic number, because the mean of its divisors is an integer number (32400104).

Almost surely, 2^97200309 is an apocalyptic number.

It is an amenable number.

97200309 is a deficient number, since it is larger than the sum of its proper divisors (32400107).

97200309 is a wasteful number, since it uses less digits than its factorization.

97200309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32400106.

The product of its (nonzero) digits is 3402, while the sum is 30.

The square root of 97200309 is about 9859.0217060315. The cubic root of 97200309 is about 459.7861466570.

Subtracting from 97200309 its sum of digits (30), we obtain a palindrome (97200279).

The spelling of 97200309 in words is "ninety-seven million, two hundred thousand, three hundred nine".