9978974 has 8 divisors (see below), whose sum is σ = 15373128. Its totient is φ = 4854600.

The previous prime is 9978961. The next prime is 9978989. The reversal of 9978974 is 4798799.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67352 + ... + 67499.

It is an arithmetic number, because the mean of its divisors is an integer number (1921641).

Almost surely, 2^9978974 is an apocalyptic number.

9978974 is a deficient number, since it is larger than the sum of its proper divisors (5394154).

9978974 is a wasteful number, since it uses less digits than its factorization.

9978974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134890.

The product of its digits is 1143072, while the sum is 53.

The square root of 9978974 is about 3158.9514082999. The cubic root of 9978974 is about 215.2923659046.

The spelling of 9978974 in words is "nine million, nine hundred seventy-eight thousand, nine hundred seventy-four".