97101897661 has 4 divisors (see below), whose sum is σ = 102813774012. Its totient is φ = 91390021312.

The previous prime is 97101897653. The next prime is 97101897689. The reversal of 97101897661 is 16679810179.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16679810179 = 1061 ⋅15720839.

It can be written as a sum of positive squares in 2 ways, for example, as 26343237636 + 70758660025 = 162306^2 + 266005^2 .

It is a cyclic number.

It is not a de Polignac number, because 97101897661 - 2³ = 97101897653 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 (97101897601) 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, 2855938150 + ... + 2855938183.

It is an arithmetic number, because the mean of its divisors is an integer number (25703443503).

Almost surely, 2^97101897661 is an apocalyptic number.

It is an amenable number.

97101897661 is a deficient number, since it is larger than the sum of its proper divisors (5711876351).

97101897661 is a wasteful number, since it uses less digits than its factorization.

97101897661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5711876350.

The product of its (nonzero) digits is 1143072, while the sum is 55.

The spelling of 97101897661 in words is "ninety-seven billion, one hundred one million, eight hundred ninety-seven thousand, six hundred sixty-one".