97681642589 has 4 divisors (see below), whose sum is σ = 99019747356. Its totient is φ = 96343537824.

The previous prime is 97681642573. The next prime is 97681642607. The reversal of 97681642589 is 98524618679.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98524618679 = 23 ⋅4283679073.

It can be written as a sum of positive squares in 2 ways, for example, as 40374070489 + 57307572100 = 200933^2 + 239390^2 .

It is a cyclic number.

It is not a de Polignac number, because 97681642589 - 2⁴ = 97681642573 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 (97681642489) 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, 669052274 + ... + 669052419.

It is an arithmetic number, because the mean of its divisors is an integer number (24754936839).

Almost surely, 2^97681642589 is an apocalyptic number.

It is an amenable number.

97681642589 is a deficient number, since it is larger than the sum of its proper divisors (1338104767).

97681642589 is a wasteful number, since it uses less digits than its factorization.

97681642589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338104766.

The product of its digits is 52254720, while the sum is 65.

The spelling of 97681642589 in words is "ninety-seven billion, six hundred eighty-one million, six hundred forty-two thousand, five hundred eighty-nine".