320520107 has 4 divisors (see below), whose sum is σ = 323824536. Its totient is φ = 317215680.

The previous prime is 320520089. The next prime is 320520113. The reversal of 320520107 is 701025023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 701025023 = 22481 ⋅31183.

It is a cyclic number.

It is not a de Polignac number, because 320520107 - 2⁶ = 320520043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320520127) 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, 1652069 + ... + 1652262.

It is an arithmetic number, because the mean of its divisors is an integer number (80956134).

Almost surely, 2^320520107 is an apocalyptic number.

320520107 is a deficient number, since it is larger than the sum of its proper divisors (3304429).

320520107 is an equidigital number, since it uses as much as digits as its factorization.

320520107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3304428.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 320520107 is about 17903.0753503413. The cubic root of 320520107 is about 684.3607491094.

The spelling of 320520107 in words is "three hundred twenty million, five hundred twenty thousand, one hundred seven".