689042677 has 4 divisors (see below), whose sum is σ = 697344480. Its totient is φ = 680740876.

The previous prime is 689042663. The next prime is 689042681. The reversal of 689042677 is 776240986.

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, and also an emirpimes, since its reverse is a distinct semiprime: 776240986 = 2 ⋅388120493.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-689042677 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 689042677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689042477) 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, 4150777 + ... + 4150942.

It is an arithmetic number, because the mean of its divisors is an integer number (174336120).

Almost surely, 2^689042677 is an apocalyptic number.

It is an amenable number.

689042677 is a deficient number, since it is larger than the sum of its proper divisors (8301803).

689042677 is an equidigital number, since it uses as much as digits as its factorization.

689042677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8301802.

The product of its (nonzero) digits is 1016064, while the sum is 49.

The square root of 689042677 is about 26249.6224163320. The cubic root of 689042677 is about 883.2467345823.

The spelling of 689042677 in words is "six hundred eighty-nine million, forty-two thousand, six hundred seventy-seven".