9979974 has 24 divisors (see below), whose sum is σ = 22152312. Its totient is φ = 3245280.

The previous prime is 9979967. The next prime is 9979993. The reversal of 9979974 is 4799799.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9979974.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6024 + ... + 7499.

It is an arithmetic number, because the mean of its divisors is an integer number (923013).

Almost surely, 2^9979974 is an apocalyptic number.

9979974 is an abundant number, since it is smaller than the sum of its proper divisors (12172338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9979974 is a wasteful number, since it uses less digits than its factorization.

9979974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13572 (or 13569 counting only the distinct ones).

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

The square root of 9979974 is about 3159.1096847055. The cubic root of 9979974 is about 215.2995571975.

It can be divided in two parts, 997997 and 4, that added together give a square (998001 = 999²).

The spelling of 9979974 in words is "nine million, nine hundred seventy-nine thousand, nine hundred seventy-four".