97678729073 has 4 divisors (see below), whose sum is σ = 101046961140. Its totient is φ = 94310497008.

The previous prime is 97678729051. The next prime is 97678729123. The reversal of 97678729073 is 37092787679.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37092787679 = 17 ⋅2181928687.

It can be written as a sum of positive squares in 2 ways, for example, as 45355369024 + 52323360049 = 212968^2 + 228743^2 .

It is a cyclic number.

It is not a de Polignac number, because 97678729073 - 2⁶ = 97678729009 is a prime.

It is a super-2 number, since 2×97678729073² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97678722073) 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, 1684115990 + ... + 1684116047.

It is an arithmetic number, because the mean of its divisors is an integer number (25261740285).

Almost surely, 2^97678729073 is an apocalyptic number.

It is an amenable number.

97678729073 is a deficient number, since it is larger than the sum of its proper divisors (3368232067).

97678729073 is a wasteful number, since it uses less digits than its factorization.

97678729073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3368232066.

The product of its (nonzero) digits is 56010528, while the sum is 65.

The spelling of 97678729073 in words is "ninety-seven billion, six hundred seventy-eight million, seven hundred twenty-nine thousand, seventy-three".