320140493 has 2 divisors, whose sum is σ = 320140494. Its totient is φ = 320140492.

The previous prime is 320140477. The next prime is 320140507. The reversal of 320140493 is 394041023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 284833129 + 35307364 = 16877^2 + 5942^2 .

It is a cyclic number.

It is not a de Polignac number, because 320140493 - 2⁴ = 320140477 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320140463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160070246 + 160070247.

It is an arithmetic number, because the mean of its divisors is an integer number (160070247).

Almost surely, 2^320140493 is an apocalyptic number.

It is an amenable number.

320140493 is a deficient number, since it is larger than the sum of its proper divisors (1).

320140493 is an equidigital number, since it uses as much as digits as its factorization.

320140493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 320140493 is about 17892.4702878054. The cubic root of 320140493 is about 684.0904638794.

The spelling of 320140493 in words is "three hundred twenty million, one hundred forty thousand, four hundred ninety-three".