97506509 has 4 divisors (see below), whose sum is σ = 103242204. Its totient is φ = 91770816.

The previous prime is 97506473. The next prime is 97506517. The reversal of 97506509 is 90560579.

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 43850884 + 53655625 = 6622^2 + 7325^2 .

It is a cyclic number.

It is not a de Polignac number, because 97506509 - 2¹² = 97502413 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 (97506209) 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, 2867822 + ... + 2867855.

It is an arithmetic number, because the mean of its divisors is an integer number (25810551).

Almost surely, 2^97506509 is an apocalyptic number.

It is an amenable number.

97506509 is a deficient number, since it is larger than the sum of its proper divisors (5735695).

97506509 is a wasteful number, since it uses less digits than its factorization.

97506509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5735694.

The product of its (nonzero) digits is 85050, while the sum is 41.

The square root of 97506509 is about 9874.5384195921. The cubic root of 97506509 is about 460.2684460198.

The spelling of 97506509 in words is "ninety-seven million, five hundred six thousand, five hundred nine".