689407 has 4 divisors (see below), whose sum is σ = 691360. Its totient is φ = 687456.

The previous prime is 689393. The next prime is 689411. The reversal of 689407 is 704986.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 704986 = 2 ⋅352493.

It is a cyclic number.

It is not a de Polignac number, because 689407 - 2⁷ = 689279 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 (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, 282 + ... + 1207.

It is an arithmetic number, because the mean of its divisors is an integer number (172840).

2⁶⁸⁹⁴⁰⁷ is an apocalyptic number.

689407 is a deficient number, since it is larger than the sum of its proper divisors (1953).

689407 is a wasteful number, since it uses less digits than its factorization.

689407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1952.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 689407 is about 830.3053655132. The cubic root of 689407 is about 88.3402375838.

The spelling of 689407 in words is "six hundred eighty-nine thousand, four hundred seven".