9797979 has 4 divisors (see below), whose sum is σ = 13063976.
Its totient is φ = 6531984.
The previous prime is 9797959. The next prime is 9797993.
9797979 is nontrivially palindromic in base 10.
It is a semiprime because it is the product of two primes.
It is not a de Polignac number, because 9797979 - 29 = 9797467 is a prime.
It is a Duffinian number.
9797979 is an undulating number in base 10.
It is not an unprimeable number, because it can be changed into a prime (9797959) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1632994 + ... + 1632999.
It is an arithmetic number, because the mean of its divisors is an integer number (3265994).
Almost surely, 29797979 is an apocalyptic number.
9797979 is a deficient number, since it is larger than the sum of its proper divisors (3265997).
9797979 is a wasteful number, since it uses less digits than its factorization.
9797979 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3265996.
The product of its digits is 2250423, while the sum is 57.
The square root of 9797979 is about 3130.1723594716.
The cubic root of 9797979 is about 213.9827845935.
The spelling of 9797979 in words is "nine million, seven hundred ninety-seven thousand, nine hundred seventy-nine".