643107002 has 16 divisors (see below), whose sum is σ = 1007285760. Its totient is φ = 307364112.

The previous prime is 643106983. The next prime is 643107007. The reversal of 643107002 is 200701346.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (643107007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80024 + ... + 87692.

It is an arithmetic number, because the mean of its divisors is an integer number (62955360).

Almost surely, 2^643107002 is an apocalyptic number.

643107002 is a deficient number, since it is larger than the sum of its proper divisors (364178758).

643107002 is a wasteful number, since it uses less digits than its factorization.

643107002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9517.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 643107002 is about 25359.5544519221. The cubic root of 643107002 is about 863.1661738979.

Adding to 643107002 its reverse (200701346), we get a palindrome (843808348).

The spelling of 643107002 in words is "six hundred forty-three million, one hundred seven thousand, two".