652660387 has 2 divisors, whose sum is σ = 652660388. Its totient is φ = 652660386.

The previous prime is 652660381. The next prime is 652660417. The reversal of 652660387 is 783066256.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-652660387 is a prime.

It is not a weakly prime, because it can be changed into another prime (652660381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326330193 + 326330194.

It is an arithmetic number, because the mean of its divisors is an integer number (326330194).

Almost surely, 2^652660387 is an apocalyptic number.

652660387 is a deficient number, since it is larger than the sum of its proper divisors (1).

652660387 is an equidigital number, since it uses as much as digits as its factorization.

652660387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 43.

The square root of 652660387 is about 25547.2187723047. The cubic root of 652660387 is about 867.4193075512.

The spelling of 652660387 in words is "six hundred fifty-two million, six hundred sixty thousand, three hundred eighty-seven".