643069234 has 12 divisors (see below), whose sum is σ = 1021580154. Its totient is φ = 302551232.

The previous prime is 643069201. The next prime is 643069241. The reversal of 643069234 is 432960346.

It can be written as a sum of positive squares in 3 ways, for example, as 260984025 + 382085209 = 16155^2 + 19547^2 .

It is a junction number, because it is equal to n+sod(n) for n = 643069193 and 643069202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 145692 + ... + 150040.

Almost surely, 2^643069234 is an apocalyptic number.

643069234 is a deficient number, since it is larger than the sum of its proper divisors (378510920).

643069234 is an frugal number, since it uses more digits than its factorization.

643069234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8717 (or 4368 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 37.

The square root of 643069234 is about 25358.8097906822. The cubic root of 643069234 is about 863.1492763997.

The spelling of 643069234 in words is "six hundred forty-three million, sixty-nine thousand, two hundred thirty-four".