320288677 has 2 divisors, whose sum is σ = 320288678. Its totient is φ = 320288676.

The previous prime is 320288651. The next prime is 320288713. The reversal of 320288677 is 776882023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198274561 + 122014116 = 14081^2 + 11046^2 .

It is an emirp because it is prime and its reverse (776882023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320288677 - 2²⁷ = 186070949 is a prime.

It is a super-2 number, since 2×320288677² = 205169673228820658, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320288627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160144338 + 160144339.

It is an arithmetic number, because the mean of its divisors is an integer number (160144339).

Almost surely, 2^320288677 is an apocalyptic number.

It is an amenable number.

320288677 is a deficient number, since it is larger than the sum of its proper divisors (1).

320288677 is an equidigital number, since it uses as much as digits as its factorization.

320288677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 320288677 is about 17896.6107685226. The cubic root of 320288677 is about 684.1959963221.

The spelling of 320288677 in words is "three hundred twenty million, two hundred eighty-eight thousand, six hundred seventy-seven".