659469 has 4 divisors (see below), whose sum is σ = 879296. Its totient is φ = 439644.

The previous prime is 659467. The next prime is 659473. The reversal of 659469 is 964956.

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 not a de Polignac number, because 659469 - 2¹ = 659467 is a prime.

It is a super-2 number, since 2×659469² = 869798723922, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

659469 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659467) 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, 109909 + ... + 109914.

It is an arithmetic number, because the mean of its divisors is an integer number (219824).

2⁶⁵⁹⁴⁶⁹ is an apocalyptic number.

It is an amenable number.

659469 is a deficient number, since it is larger than the sum of its proper divisors (219827).

659469 is a wasteful number, since it uses less digits than its factorization.

659469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219826.

The product of its digits is 58320, while the sum is 39.

The square root of 659469 is about 812.0769667956. The cubic root of 659469 is about 87.0425211619.

It can be divided in two parts, 659 and 469, that added together give a triangular number (1128 = T₄₇).

The spelling of 659469 in words is "six hundred fifty-nine thousand, four hundred sixty-nine".