320281061 has 2 divisors, whose sum is σ = 320281062. Its totient is φ = 320281060.

The previous prime is 320281051. The next prime is 320281063. The reversal of 320281061 is 160182023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161772961 + 158508100 = 12719^2 + 12590^2 .

It is an emirp because it is prime and its reverse (160182023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320281061 - 2⁶ = 320280997 is a prime.

Together with 320281063, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320281063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160140530 + 160140531.

It is an arithmetic number, because the mean of its divisors is an integer number (160140531).

Almost surely, 2^320281061 is an apocalyptic number.

It is an amenable number.

320281061 is a deficient number, since it is larger than the sum of its proper divisors (1).

320281061 is an equidigital number, since it uses as much as digits as its factorization.

320281061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 320281061 is about 17896.3979895397. The cubic root of 320281061 is about 684.1905732164.

The spelling of 320281061 in words is "three hundred twenty million, two hundred eighty-one thousand, sixty-one".