689477 has 4 divisors (see below), whose sum is σ = 702540. Its totient is φ = 676416.

The previous prime is 689467. The next prime is 689509. The reversal of 689477 is 774986.

689477 is nontrivially palindromic in base 7.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 774986 = 2 ⋅387493.

It can be written as a sum of positive squares in 2 ways, for example, as 312481 + 376996 = 559^2 + 614^2 .

It is a cyclic number.

It is not a de Polignac number, because 689477 - 2⁴ = 689461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 689477.

It is not an unprimeable number, because it can be changed into a prime (689467) 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, 6452 + ... + 6557.

It is an arithmetic number, because the mean of its divisors is an integer number (175635).

2⁶⁸⁹⁴⁷⁷ is an apocalyptic number.

It is an amenable number.

689477 is a deficient number, since it is larger than the sum of its proper divisors (13063).

689477 is a wasteful number, since it uses less digits than its factorization.

689477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13062.

The product of its digits is 84672, while the sum is 41.

The square root of 689477 is about 830.3475176093. The cubic root of 689477 is about 88.3432274033.

The spelling of 689477 in words is "six hundred eighty-nine thousand, four hundred seventy-seven".