97678973 has 4 divisors (see below), whose sum is σ = 111633120. Its totient is φ = 83724828.

The previous prime is 97678961. The next prime is 97679017. The reversal of 97678973 is 37987679.

97678973 is nontrivially palindromic in base 9.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37987679 = 31 ⋅1225409.

It is a cyclic number.

It is not a de Polignac number, because 97678973 - 2⁸ = 97678717 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 (97678673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6977063 + ... + 6977076.

It is an arithmetic number, because the mean of its divisors is an integer number (27908280).

Almost surely, 2^97678973 is an apocalyptic number.

It is an amenable number.

97678973 is a deficient number, since it is larger than the sum of its proper divisors (13954147).

97678973 is a wasteful number, since it uses less digits than its factorization.

97678973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13954146.

The product of its digits is 4000752, while the sum is 56.

The square root of 97678973 is about 9883.2673241191. The cubic root of 97678973 is about 460.5396517858.

The spelling of 97678973 in words is "ninety-seven million, six hundred seventy-eight thousand, nine hundred seventy-three".