97200091 has 4 divisors (see below), whose sum is σ = 97709184. Its totient is φ = 96691000.

The previous prime is 97200079. The next prime is 97200109. The reversal of 97200091 is 19000279.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 97200091 - 2⁹ = 97199579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97200041) 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 in 3 ways as a sum of consecutive naturals, for example, 254260 + ... + 254641.

It is an arithmetic number, because the mean of its divisors is an integer number (24427296).

Almost surely, 2^97200091 is an apocalyptic number.

97200091 is a deficient number, since it is larger than the sum of its proper divisors (509093).

97200091 is a wasteful number, since it uses less digits than its factorization.

97200091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509092.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 97200091 is about 9859.0106501616. The cubic root of 97200091 is about 459.7858029220.

The spelling of 97200091 in words is "ninety-seven million, two hundred thousand, ninety-one".