646053 has 4 divisors (see below), whose sum is σ = 861408. Its totient is φ = 430700.

The previous prime is 646039. The next prime is 646067. The reversal of 646053 is 350646.

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 an interprime number because it is at equal distance from previous prime (646039) and next prime (646067).

It is a cyclic number.

It is not a de Polignac number, because 646053 - 2¹⁸ = 383909 is a prime.

It is a D-number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646003) 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, 107673 + ... + 107678.

It is an arithmetic number, because the mean of its divisors is an integer number (215352).

2⁶⁴⁶⁰⁵³ is an apocalyptic number.

It is an amenable number.

646053 is a deficient number, since it is larger than the sum of its proper divisors (215355).

646053 is a wasteful number, since it uses less digits than its factorization.

646053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215354.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 646053 is about 803.7742220300. The cubic root of 646053 is about 86.4482187552.

Adding to 646053 its reverse (350646), we get a palindrome (996699).

The spelling of 646053 in words is "six hundred forty-six thousand, fifty-three".