979548391 has 4 divisors (see below), whose sum is σ = 981560272. Its totient is φ = 977536512.

The previous prime is 979548379. The next prime is 979548461. The reversal of 979548391 is 193845979.

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

It is a cyclic number.

It is not a de Polignac number, because 979548391 - 2⁵ = 979548359 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 (979548301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1005210 + ... + 1006183.

It is an arithmetic number, because the mean of its divisors is an integer number (245390068).

Almost surely, 2^979548391 is an apocalyptic number.

979548391 is a deficient number, since it is larger than the sum of its proper divisors (2011881).

979548391 is a wasteful number, since it uses less digits than its factorization.

979548391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011880.

The product of its digits is 2449440, while the sum is 55.

The square root of 979548391 is about 31297.7377936489. The cubic root of 979548391 is about 993.1357873933.

The spelling of 979548391 in words is "nine hundred seventy-nine million, five hundred forty-eight thousand, three hundred ninety-one".