9978967 has 8 divisors (see below), whose sum is σ = 10264320. Its totient is φ = 9696120.

The previous prime is 9978961. The next prime is 9978989. The reversal of 9978967 is 7698799.

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

It is a cyclic number.

It is not a de Polignac number, because 9978967 - 2³ = 9978959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9978961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9792 + ... + 10762.

It is an arithmetic number, because the mean of its divisors is an integer number (1283040).

Almost surely, 2^9978967 is an apocalyptic number.

9978967 is a deficient number, since it is larger than the sum of its proper divisors (285353).

9978967 is a wasteful number, since it uses less digits than its factorization.

9978967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253.

The product of its digits is 1714608, while the sum is 55.

The square root of 9978967 is about 3158.9503003371. The cubic root of 9978967 is about 215.2923155638.

It can be divided in two parts, 99789 and 67, that added together give a square (99856 = 316²).

The spelling of 9978967 in words is "nine million, nine hundred seventy-eight thousand, nine hundred sixty-seven".