979491 has 4 divisors (see below), whose sum is σ = 1305992. Its totient is φ = 652992.

The previous prime is 979481. The next prime is 979519. The reversal of 979491 is 194979.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-979491 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (979471) 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, 163246 + ... + 163251.

It is an arithmetic number, because the mean of its divisors is an integer number (326498).

2⁹⁷⁹⁴⁹¹ is an apocalyptic number.

979491 is a deficient number, since it is larger than the sum of its proper divisors (326501).

979491 is a wasteful number, since it uses less digits than its factorization.

979491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326500.

The product of its digits is 20412, while the sum is 39.

The square root of 979491 is about 989.6923764484. The cubic root of 979491 is about 99.3116391323.

The spelling of 979491 in words is "nine hundred seventy-nine thousand, four hundred ninety-one".