689217677 has 4 divisors (see below), whose sum is σ = 699504576. Its totient is φ = 678930780.

The previous prime is 689217653. The next prime is 689217679. The reversal of 689217677 is 776712986.

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 689217677 - 2¹⁰ = 689216653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689217679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5143349 + ... + 5143482.

It is an arithmetic number, because the mean of its divisors is an integer number (174876144).

Almost surely, 2^689217677 is an apocalyptic number.

689217677 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

689217677 is a deficient number, since it is larger than the sum of its proper divisors (10286899).

689217677 is a wasteful number, since it uses less digits than its factorization.

689217677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10286898.

The product of its digits is 1778112, while the sum is 53.

The square root of 689217677 is about 26252.9555859907. The cubic root of 689217677 is about 883.3215026144.

The spelling of 689217677 in words is "six hundred eighty-nine million, two hundred seventeen thousand, six hundred seventy-seven".