320134391 has 2 divisors, whose sum is σ = 320134392. Its totient is φ = 320134390.

The previous prime is 320134387. The next prime is 320134453. The reversal of 320134391 is 193431023.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 320134391 - 2² = 320134387 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320134391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320134351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160067195 + 160067196.

It is an arithmetic number, because the mean of its divisors is an integer number (160067196).

Almost surely, 2^320134391 is an apocalyptic number.

320134391 is a deficient number, since it is larger than the sum of its proper divisors (1).

320134391 is an equidigital number, since it uses as much as digits as its factorization.

320134391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 320134391 is about 17892.2997683361. The cubic root of 320134391 is about 684.0861175100.

The spelling of 320134391 in words is "three hundred twenty million, one hundred thirty-four thousand, three hundred ninety-one".