645000359 has 2 divisors, whose sum is σ = 645000360. Its totient is φ = 645000358.

The previous prime is 645000347. The next prime is 645000401. The reversal of 645000359 is 953000546.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-645000359 is a prime.

It is a super-2 number, since 2×645000359² = 832050926220257762, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (645000659) 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, 322500179 + 322500180.

It is an arithmetic number, because the mean of its divisors is an integer number (322500180).

Almost surely, 2^645000359 is an apocalyptic number.

645000359 is a deficient number, since it is larger than the sum of its proper divisors (1).

645000359 is an equidigital number, since it uses as much as digits as its factorization.

645000359 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 645000359 is about 25396.8572662052. The cubic root of 645000359 is about 864.0124200711.

The spelling of 645000359 in words is "six hundred forty-five million, three hundred fifty-nine", and thus it is an aban number.