320196857 has 4 divisors (see below), whose sum is σ = 321069696. Its totient is φ = 319324020.

The previous prime is 320196847. The next prime is 320196871. The reversal of 320196857 is 758691023.

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 320196857 - 2⁴ = 320196841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320196817) 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, 435869 + ... + 436602.

It is an arithmetic number, because the mean of its divisors is an integer number (80267424).

Almost surely, 2^320196857 is an apocalyptic number.

It is an amenable number.

320196857 is a deficient number, since it is larger than the sum of its proper divisors (872839).

320196857 is an equidigital number, since it uses as much as digits as its factorization.

320196857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872838.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 320196857 is about 17894.0452944548. The cubic root of 320196857 is about 684.1306085587.

The spelling of 320196857 in words is "three hundred twenty million, one hundred ninety-six thousand, eight hundred fifty-seven".