648120587 has 2 divisors, whose sum is σ = 648120588. Its totient is φ = 648120586.

The previous prime is 648120479. The next prime is 648120617. The reversal of 648120587 is 785021846.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648120587 is a prime.

It is not a weakly prime, because it can be changed into another prime (648123587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324060293 + 324060294.

It is an arithmetic number, because the mean of its divisors is an integer number (324060294).

Almost surely, 2^648120587 is an apocalyptic number.

648120587 is a deficient number, since it is larger than the sum of its proper divisors (1).

648120587 is an equidigital number, since it uses as much as digits as its factorization.

648120587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 107520, while the sum is 41.

The square root of 648120587 is about 25458.2125649072. The cubic root of 648120587 is about 865.4034168023.

The spelling of 648120587 in words is "six hundred forty-eight million, one hundred twenty thousand, five hundred eighty-seven".