320422857 has 4 divisors (see below), whose sum is σ = 427230480. Its totient is φ = 213615236.

The previous prime is 320422819. The next prime is 320422871. The reversal of 320422857 is 758224023.

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 320422857 - 2¹⁹ = 319898569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320422807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53403807 + ... + 53403812.

It is an arithmetic number, because the mean of its divisors is an integer number (106807620).

Almost surely, 2^320422857 is an apocalyptic number.

It is an amenable number.

320422857 is a deficient number, since it is larger than the sum of its proper divisors (106807623).

320422857 is a wasteful number, since it uses less digits than its factorization.

320422857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106807622.

The product of its (nonzero) digits is 26880, while the sum is 33.

The square root of 320422857 is about 17900.3591304756. The cubic root of 320422857 is about 684.2915274353.

The spelling of 320422857 in words is "three hundred twenty million, four hundred twenty-two thousand, eight hundred fifty-seven".