320090387 has 2 divisors, whose sum is σ = 320090388. Its totient is φ = 320090386.

The previous prime is 320090347. The next prime is 320090411. The reversal of 320090387 is 783090023.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320090387 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (320090317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160045193 + 160045194.

It is an arithmetic number, because the mean of its divisors is an integer number (160045194).

Almost surely, 2^320090387 is an apocalyptic number.

320090387 is a deficient number, since it is larger than the sum of its proper divisors (1).

320090387 is an equidigital number, since it uses as much as digits as its factorization.

320090387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 320090387 is about 17891.0700350762. The cubic root of 320090387 is about 684.0547724398.

The spelling of 320090387 in words is "three hundred twenty million, ninety thousand, three hundred eighty-seven".