9974979 has 18 divisors (see below), whose sum is σ = 16761420. Its totient is φ = 5699736.

The previous prime is 9974977. The next prime is 9974983. The reversal of 9974979 is 9794799.

It is not a de Polignac number, because 9974979 - 2¹ = 9974977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9974977) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 10869 + ... + 11750.

It is an arithmetic number, because the mean of its divisors is an integer number (931190).

Almost surely, 2^9974979 is an apocalyptic number.

9974979 is a deficient number, since it is larger than the sum of its proper divisors (6786441).

9974979 is a wasteful number, since it uses less digits than its factorization.

9974979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22639 (or 22629 counting only the distinct ones).

The product of its digits is 1285956, while the sum is 54.

The square root of 9974979 is about 3158.3190149192. The cubic root of 9974979 is about 215.2636318949.

It can be divided in two parts, 99 and 74979, that added together give a triangular number (75078 = T₃₈₇).

The spelling of 9974979 in words is "nine million, nine hundred seventy-four thousand, nine hundred seventy-nine".