320404727 has 4 divisors (see below), whose sum is σ = 321651696. Its totient is φ = 319157760.

The previous prime is 320404649. The next prime is 320404783. The reversal of 320404727 is 727404023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 727404023 = 907 ⋅801989.

It is a cyclic number.

It is not a de Polignac number, because 320404727 - 2⁸ = 320404471 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320404727.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320400727) 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, 623099 + ... + 623612.

It is an arithmetic number, because the mean of its divisors is an integer number (80412924).

Almost surely, 2^320404727 is an apocalyptic number.

320404727 is a deficient number, since it is larger than the sum of its proper divisors (1246969).

320404727 is a wasteful number, since it uses less digits than its factorization.

320404727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246968.

The product of its (nonzero) digits is 9408, while the sum is 29.

The square root of 320404727 is about 17899.8527088912. The cubic root of 320404727 is about 684.2786211157.

The spelling of 320404727 in words is "three hundred twenty million, four hundred four thousand, seven hundred twenty-seven".