97979 has 4 divisors (see below), whose sum is σ = 111984. Its totient is φ = 83976.

The previous prime is 97973. The next prime is 97987.

97979 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 97979 - 2¹⁶ = 32443 is a prime.

It is a Duffinian number.

97979 is an undulating number in base 10.

It is a plaindrome in base 13.

It is a nialpdrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (97973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6992 + ... + 7005.

It is an arithmetic number, because the mean of its divisors is an integer number (27996).

2⁹⁷⁹⁷⁹ is an apocalyptic number.

97979 is a deficient number, since it is larger than the sum of its proper divisors (14005).

97979 is a wasteful number, since it uses less digits than its factorization.

97979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14004.

The product of its digits is 35721, while the sum is 41.

The square root of 97979 is about 313.0159740333. The cubic root of 97979 is about 46.1010695166.

The spelling of 97979 in words is "ninety-seven thousand, nine hundred seventy-nine".