656493 has 8 divisors (see below), whose sum is σ = 890400. Its totient is φ = 430128.

The previous prime is 656483. The next prime is 656519. The reversal of 656493 is 394656.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 656493 - 2⁶ = 656429 is a prime.

It is a d-powerful number, because it can be written as 6 + 5⁷ + 4⁴ + 6⁶ + 9 + 3¹² .

656493 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1678 + ... + 2031.

It is an arithmetic number, because the mean of its divisors is an integer number (111300).

2⁶⁵⁶⁴⁹³ is an apocalyptic number.

It is an amenable number.

656493 is a deficient number, since it is larger than the sum of its proper divisors (233907).

656493 is a wasteful number, since it uses less digits than its factorization.

656493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3771.

The product of its digits is 19440, while the sum is 33.

The square root of 656493 is about 810.2425562756. The cubic root of 656493 is about 86.9113908236.

The spelling of 656493 in words is "six hundred fifty-six thousand, four hundred ninety-three".