979899 has 4 divisors (see below), whose sum is σ = 1306536. Its totient is φ = 653264.

The previous prime is 979889. The next prime is 979907. The reversal of 979899 is 998979.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 998979 = 3 ⋅332993.

It is a cyclic number.

It is not a de Polignac number, because 979899 - 2⁴ = 979883 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (979819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163314 + ... + 163319.

It is an arithmetic number, because the mean of its divisors is an integer number (326634).

2⁹⁷⁹⁸⁹⁹ is an apocalyptic number.

979899 is a deficient number, since it is larger than the sum of its proper divisors (326637).

979899 is a wasteful number, since it uses less digits than its factorization.

979899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326636.

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

The square root of 979899 is about 989.8984796432. The cubic root of 979899 is about 99.3254264034.

The spelling of 979899 in words is "nine hundred seventy-nine thousand, eight hundred ninety-nine".