320540587 has 2 divisors, whose sum is σ = 320540588. Its totient is φ = 320540586.

The previous prime is 320540537. The next prime is 320540599. The reversal of 320540587 is 785045023.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 320540587 - 2⁷ = 320540459 is a prime.

It is not a weakly prime, because it can be changed into another prime (320540537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160270293 + 160270294.

It is an arithmetic number, because the mean of its divisors is an integer number (160270294).

Almost surely, 2^320540587 is an apocalyptic number.

320540587 is a deficient number, since it is larger than the sum of its proper divisors (1).

320540587 is an equidigital number, since it uses as much as digits as its factorization.

320540587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 320540587 is about 17903.6473099757. The cubic root of 320540587 is about 684.3753248040.

The spelling of 320540587 in words is "three hundred twenty million, five hundred forty thousand, five hundred eighty-seven".