689383057 has 4 divisors (see below), whose sum is σ = 752054256. Its totient is φ = 626711860.

The previous prime is 689383049. The next prime is 689383067. The reversal of 689383057 is 750383986.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 689383057 - 2³ = 689383049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 689383057.

It is not an unprimeable number, because it can be changed into a prime (689383067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31335583 + ... + 31335604.

It is an arithmetic number, because the mean of its divisors is an integer number (188013564).

Almost surely, 2^689383057 is an apocalyptic number.

It is an amenable number.

689383057 is a deficient number, since it is larger than the sum of its proper divisors (62671199).

689383057 is a wasteful number, since it uses less digits than its factorization.

689383057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62671198.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The square root of 689383057 is about 26256.1051376627. The cubic root of 689383057 is about 883.3921489100.

The spelling of 689383057 in words is "six hundred eighty-nine million, three hundred eighty-three thousand, fifty-seven".