689045943 has 4 divisors (see below), whose sum is σ = 918727928. Its totient is φ = 459363960.

The previous prime is 689045933. The next prime is 689045947. The reversal of 689045943 is 349540986.

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

It is not a de Polignac number, because 689045943 - 2⁴ = 689045927 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 689045892 and 689045901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689045947) 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, 114840988 + ... + 114840993.

It is an arithmetic number, because the mean of its divisors is an integer number (229681982).

Almost surely, 2^689045943 is an apocalyptic number.

689045943 is a deficient number, since it is larger than the sum of its proper divisors (229681985).

689045943 is a wasteful number, since it uses less digits than its factorization.

689045943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229681984.

The product of its (nonzero) digits is 933120, while the sum is 48.

The square root of 689045943 is about 26249.6846266769. The cubic root of 689045943 is about 883.2481300833.

It can be divided in two parts, 68904 and 5943, that added together give a palindrome (74847).

The spelling of 689045943 in words is "six hundred eighty-nine million, forty-five thousand, nine hundred forty-three".