97008521 has 4 divisors (see below), whose sum is σ = 97091844. Its totient is φ = 96925200.

The previous prime is 97008481. The next prime is 97008523. The reversal of 97008521 is 12580079.

97008521 = 6964² + 6965².

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

It can be written as a sum of positive squares in 2 ways, for example, as 48511225 + 48497296 = 6965^2 + 6964^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97008521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97008523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39890 + ... + 42251.

It is an arithmetic number, because the mean of its divisors is an integer number (24272961).

Almost surely, 2^97008521 is an apocalyptic number.

97008521 is the 6965-th centered square number.

It is an amenable number.

97008521 is a deficient number, since it is larger than the sum of its proper divisors (83323).

97008521 is a wasteful number, since it uses less digits than its factorization.

97008521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83322.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 97008521 is about 9849.2903805300. The cubic root of 97008521 is about 459.4835429320.

The spelling of 97008521 in words is "ninety-seven million, eight thousand, five hundred twenty-one".