320140393 has 2 divisors, whose sum is σ = 320140394. Its totient is φ = 320140392.

The previous prime is 320140363. The next prime is 320140411. The reversal of 320140393 is 393041023.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 226592809 + 93547584 = 15053^2 + 9672^2 .

It is an emirp because it is prime and its reverse (393041023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320140393 - 2¹⁷ = 320009321 is a prime.

It is not a weakly prime, because it can be changed into another prime (320140333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160070196 + 160070197.

It is an arithmetic number, because the mean of its divisors is an integer number (160070197).

Almost surely, 2^320140393 is an apocalyptic number.

It is an amenable number.

320140393 is a deficient number, since it is larger than the sum of its proper divisors (1).

320140393 is an equidigital number, since it uses as much as digits as its factorization.

320140393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 320140393 is about 17892.4674933336. The cubic root of 320140393 is about 684.0903926512.

The spelling of 320140393 in words is "three hundred twenty million, one hundred forty thousand, three hundred ninety-three".