97841378869 has 4 divisors (see below), whose sum is σ = 105367638796. Its totient is φ = 90315118944.

The previous prime is 97841378773. The next prime is 97841378881. The reversal of 97841378869 is 96887314879.

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 24339120100 + 73502258769 = 156010^2 + 271113^2 .

It is a cyclic number.

It is not a de Polignac number, because 97841378869 - 2¹¹ = 97841376821 is a prime.

It is a super-2 number, since 2×97841378869² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 97841378798 and 97841378807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97841378669) 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, 3763129944 + ... + 3763129969.

It is an arithmetic number, because the mean of its divisors is an integer number (26341909699).

Almost surely, 2^97841378869 is an apocalyptic number.

It is an amenable number.

97841378869 is a deficient number, since it is larger than the sum of its proper divisors (7526259927).

97841378869 is a wasteful number, since it uses less digits than its factorization.

97841378869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7526259926.

The product of its digits is 146313216, while the sum is 70.

The spelling of 97841378869 in words is "ninety-seven billion, eight hundred forty-one million, three hundred seventy-eight thousand, eight hundred sixty-nine".