979993 has 4 divisors (see below), whose sum is σ = 1120000. Its totient is φ = 839988.

The previous prime is 979987. The next prime is 980027. The reversal of 979993 is 399979.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 979993 - 2⁹ = 979481 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (979093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69993 + ... + 70006.

It is an arithmetic number, because the mean of its divisors is an integer number (280000).

2⁹⁷⁹⁹⁹³ is an apocalyptic number.

It is an amenable number.

979993 is a deficient number, since it is larger than the sum of its proper divisors (140007).

979993 is a wasteful number, since it uses less digits than its factorization.

979993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140006.

The product of its digits is 137781, while the sum is 46.

The square root of 979993 is about 989.9459581209. The cubic root of 979993 is about 99.3286023401.

The spelling of 979993 in words is "nine hundred seventy-nine thousand, nine hundred ninety-three".