645054587 has 2 divisors, whose sum is σ = 645054588. Its totient is φ = 645054586.

The previous prime is 645054551. The next prime is 645054601. The reversal of 645054587 is 785450546.

645054587 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 645054587 - 2⁶ = 645054523 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (645054287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322527293 + 322527294.

It is an arithmetic number, because the mean of its divisors is an integer number (322527294).

Almost surely, 2^645054587 is an apocalyptic number.

645054587 is a deficient number, since it is larger than the sum of its proper divisors (1).

645054587 is an equidigital number, since it uses as much as digits as its factorization.

645054587 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672000, while the sum is 44.

The square root of 645054587 is about 25397.9248561767. The cubic root of 645054587 is about 864.0366331597.

The spelling of 645054587 in words is "six hundred forty-five million, fifty-four thousand, five hundred eighty-seven".