645483 has 4 divisors (see below), whose sum is σ = 860648. Its totient is φ = 430320.

The previous prime is 645481. The next prime is 645493. The reversal of 645483 is 384546.

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

It is not a de Polignac number, because 645483 - 2¹ = 645481 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 645483.

It is not an unprimeable number, because it can be changed into a prime (645481) 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, 107578 + ... + 107583.

It is an arithmetic number, because the mean of its divisors is an integer number (215162).

2⁶⁴⁵⁴⁸³ is an apocalyptic number.

645483 is a deficient number, since it is larger than the sum of its proper divisors (215165).

645483 is a wasteful number, since it uses less digits than its factorization.

645483 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215164.

The product of its digits is 11520, while the sum is 30.

The square root of 645483 is about 803.4195666027. The cubic root of 645483 is about 86.4227874137.

It can be divided in two parts, 645 and 483, that added together give a triangular number (1128 = T₄₇).

The spelling of 645483 in words is "six hundred forty-five thousand, four hundred eighty-three".