320839457 has 2 divisors, whose sum is σ = 320839458. Its totient is φ = 320839456.

The previous prime is 320839439. The next prime is 320839471. The reversal of 320839457 is 754938023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 319837456 + 1002001 = 17884^2 + 1001^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320839457 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (320839357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160419728 + 160419729.

It is an arithmetic number, because the mean of its divisors is an integer number (160419729).

Almost surely, 2^320839457 is an apocalyptic number.

It is an amenable number.

320839457 is a deficient number, since it is larger than the sum of its proper divisors (1).

320839457 is an equidigital number, since it uses as much as digits as its factorization.

320839457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 320839457 is about 17911.9919886092. The cubic root of 320839457 is about 684.5879611275.

The spelling of 320839457 in words is "three hundred twenty million, eight hundred thirty-nine thousand, four hundred fifty-seven".