320779671 has 4 divisors (see below), whose sum is σ = 427706232. Its totient is φ = 213853112.

The previous prime is 320779649. The next prime is 320779673. The reversal of 320779671 is 176977023.

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 320779671 - 2¹⁷ = 320648599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320779673) 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, 53463276 + ... + 53463281.

It is an arithmetic number, because the mean of its divisors is an integer number (106926558).

Almost surely, 2^320779671 is an apocalyptic number.

320779671 is a deficient number, since it is larger than the sum of its proper divisors (106926561).

320779671 is a wasteful number, since it uses less digits than its factorization.

320779671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106926560.

The product of its (nonzero) digits is 111132, while the sum is 42.

The square root of 320779671 is about 17910.3230289127. The cubic root of 320779671 is about 684.5454358942.

The spelling of 320779671 in words is "three hundred twenty million, seven hundred seventy-nine thousand, six hundred seventy-one".