97694647861 has 4 divisors (see below), whose sum is σ = 97710237900. Its totient is φ = 97679057824.

The previous prime is 97694647837. The next prime is 97694647871. The reversal of 97694647861 is 16874649679.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16874649679 = 113 ⋅149333183.

It can be written as a sum of positive squares in 2 ways, for example, as 32501238961 + 65193408900 = 180281^2 + 255330^2 .

It is a cyclic number.

It is not a de Polignac number, because 97694647861 - 2¹⁹ = 97694123573 is a prime.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97694647871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7785616 + ... + 7798153.

It is an arithmetic number, because the mean of its divisors is an integer number (24427559475).

Almost surely, 2^97694647861 is an apocalyptic number.

It is an amenable number.

97694647861 is a deficient number, since it is larger than the sum of its proper divisors (15590039).

97694647861 is a wasteful number, since it uses less digits than its factorization.

97694647861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15590038.

The product of its digits is 109734912, while the sum is 67.

The spelling of 97694647861 in words is "ninety-seven billion, six hundred ninety-four million, six hundred forty-seven thousand, eight hundred sixty-one".