97561517 has 4 divisors (see below), whose sum is σ = 97581276. Its totient is φ = 97541760.

The previous prime is 97561501. The next prime is 97561543. The reversal of 97561517 is 71516579.

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 31967716 + 65593801 = 5654^2 + 8099^2 .

It is a cyclic number.

It is not a de Polignac number, because 97561517 - 2⁴ = 97561501 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 (97561577) 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, 4667 + ... + 14727.

It is an arithmetic number, because the mean of its divisors is an integer number (24395319).

Almost surely, 2^97561517 is an apocalyptic number.

It is an amenable number.

97561517 is a deficient number, since it is larger than the sum of its proper divisors (19759).

97561517 is a wasteful number, since it uses less digits than its factorization.

97561517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19758.

The product of its digits is 66150, while the sum is 41.

The square root of 97561517 is about 9877.3233722502. The cubic root of 97561517 is about 460.3549827625.

The spelling of 97561517 in words is "ninety-seven million, five hundred sixty-one thousand, five hundred seventeen".