643007962 has 4 divisors (see below), whose sum is σ = 964511946. Its totient is φ = 321503980.

The previous prime is 643007951. The next prime is 643007969. The reversal of 643007962 is 269700346.

643007962 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 364084561 + 278923401 = 19081^2 + 16701^2 .

It is not an unprimeable number, because it can be changed into a prime (643007969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160751989 + ... + 160751992.

Almost surely, 2^643007962 is an apocalyptic number.

643007962 is a deficient number, since it is larger than the sum of its proper divisors (321503984).

643007962 is a wasteful number, since it uses less digits than its factorization.

643007962 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321503983.

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 643007962 is about 25357.6016610404. The cubic root of 643007962 is about 863.1218617454.

The spelling of 643007962 in words is "six hundred forty-three million, seven thousand, nine hundred sixty-two".