423653 has 4 divisors (see below), whose sum is σ = 434028. Its totient is φ = 413280.

The previous prime is 423649. The next prime is 423667. The reversal of 423653 is 356324.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 145924 + 277729 = 382^2 + 527^2 .

It is not a de Polignac number, because 423653 - 2² = 423649 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 4⁸ + 2 + 6⁷ + 3³ + 5⁷ + 3³ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423053) 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, 5126 + ... + 5207.

It is an arithmetic number, because the mean of its divisors is an integer number (108507).

2⁴²³⁶⁵³ is an apocalyptic number.

It is an amenable number.

423653 is a deficient number, since it is larger than the sum of its proper divisors (10375).

423653 is a wasteful number, since it uses less digits than its factorization.

423653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10374.

The product of its digits is 2160, while the sum is 23.

The square root of 423653 is about 650.8863187992. The cubic root of 423653 is about 75.1052152905.

Adding to 423653 its reverse (356324), we get a palindrome (779977).

The spelling of 423653 in words is "four hundred twenty-three thousand, six hundred fifty-three".