689764543 has 24 divisors (see below), whose sum is σ = 793590480. Its totient is φ = 597542400.

The previous prime is 689764541. The next prime is 689764567. The reversal of 689764543 is 345467986.

It is not a de Polignac number, because 689764543 - 2¹ = 689764541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689764541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 361893 + ... + 363793.

It is an arithmetic number, because the mean of its divisors is an integer number (33066270).

Almost surely, 2^689764543 is an apocalyptic number.

689764543 is a deficient number, since it is larger than the sum of its proper divisors (103825937).

689764543 is a wasteful number, since it uses less digits than its factorization.

689764543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2059 (or 2046 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 52.

The square root of 689764543 is about 26263.3688433148. The cubic root of 689764543 is about 883.5550673293. Note that the first 3 decimals are identical.

The spelling of 689764543 in words is "six hundred eighty-nine million, seven hundred sixty-four thousand, five hundred forty-three".