645030767 has 2 divisors, whose sum is σ = 645030768. Its totient is φ = 645030766.

The previous prime is 645030761. The next prime is 645030821. The reversal of 645030767 is 767030546.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 645030767 - 2⁶ = 645030703 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 645030767.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (645030761) 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, 322515383 + 322515384.

It is an arithmetic number, because the mean of its divisors is an integer number (322515384).

Almost surely, 2^645030767 is an apocalyptic number.

645030767 is a deficient number, since it is larger than the sum of its proper divisors (1).

645030767 is an equidigital number, since it uses as much as digits as its factorization.

645030767 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105840, while the sum is 38.

The square root of 645030767 is about 25397.4559158983. The cubic root of 645030767 is about 864.0259975709.

The spelling of 645030767 in words is "six hundred forty-five million, thirty thousand, seven hundred sixty-seven".