9978099 has 16 divisors (see below), whose sum is σ = 14239008. Its totient is φ = 6193152.

The previous prime is 9978079. The next prime is 9978103. The reversal of 9978099 is 9908799.

It is not a de Polignac number, because 9978099 - 2⁷ = 9977971 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (9978079) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3939 + ... + 5955.

It is an arithmetic number, because the mean of its divisors is an integer number (889938).

Almost surely, 2^9978099 is an apocalyptic number.

9978099 is a deficient number, since it is larger than the sum of its proper divisors (4260909).

9978099 is a wasteful number, since it uses less digits than its factorization.

9978099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2134.

The product of its (nonzero) digits is 367416, while the sum is 51.

The square root of 9978099 is about 3158.8129099394. The cubic root of 9978099 is about 215.2860731291.

The spelling of 9978099 in words is "nine million, nine hundred seventy-eight thousand, ninety-nine".