643713524 has 12 divisors (see below), whose sum is σ = 1133245344. Its totient is φ = 319929144.

The previous prime is 643713523. The next prime is 643713533. The reversal of 643713524 is 425317346.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643713523) 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, 481154 + ... + 482489.

It is an arithmetic number, because the mean of its divisors is an integer number (94437112).

Almost surely, 2^643713524 is an apocalyptic number.

It is an amenable number.

643713524 is a deficient number, since it is larger than the sum of its proper divisors (489531820).

643713524 is a wasteful number, since it uses less digits than its factorization.

643713524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963814 (or 963812 counting only the distinct ones).

The product of its digits is 60480, while the sum is 35.

The square root of 643713524 is about 25371.5100851329. The cubic root of 643713524 is about 863.4374427933.

The spelling of 643713524 in words is "six hundred forty-three million, seven hundred thirteen thousand, five hundred twenty-four".