643036034 has 4 divisors (see below), whose sum is σ = 964554054. Its totient is φ = 321518016.

The previous prime is 643036027. The next prime is 643036073. The reversal of 643036034 is 430630346.

643036034 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., 626250625 + 16785409 = 25025^2 + 4097^2 .

It is a junction number, because it is equal to n+sod(n) for n = 643035988 and 643036006.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160759007 + ... + 160759010.

Almost surely, 2^643036034 is an apocalyptic number.

643036034 is a deficient number, since it is larger than the sum of its proper divisors (321518020).

643036034 is a wasteful number, since it uses less digits than its factorization.

643036034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321518019.

The product of its (nonzero) digits is 15552, while the sum is 29.

The square root of 643036034 is about 25358.1551773783. The cubic root of 643036034 is about 863.1344220898.

The spelling of 643036034 in words is "six hundred forty-three million, thirty-six thousand, thirty-four".