643054039 has 4 divisors (see below), whose sum is σ = 653953320. Its totient is φ = 632154760.

The previous prime is 643054021. The next prime is 643054081. The reversal of 643054039 is 930450346.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 643054039 - 2⁷ = 643053911 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 643053995 and 643054013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643054939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5449552 + ... + 5449669.

It is an arithmetic number, because the mean of its divisors is an integer number (163488330).

Almost surely, 2^643054039 is an apocalyptic number.

643054039 is a deficient number, since it is larger than the sum of its proper divisors (10899281).

643054039 is a wasteful number, since it uses less digits than its factorization.

643054039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10899280.

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 643054039 is about 25358.5101888893. The cubic root of 643054039 is about 863.1424779319.

The spelling of 643054039 in words is "six hundred forty-three million, fifty-four thousand, thirty-nine".