646453 has 2 divisors, whose sum is σ = 646454. Its totient is φ = 646452.

The previous prime is 646433. The next prime is 646519. The reversal of 646453 is 354646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 643204 + 3249 = 802^2 + 57^2 .

It is a cyclic number.

It is not a de Polignac number, because 646453 - 2⁵ = 646421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (646403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323226 + 323227.

It is an arithmetic number, because the mean of its divisors is an integer number (323227).

2⁶⁴⁶⁴⁵³ is an apocalyptic number.

It is an amenable number.

646453 is a deficient number, since it is larger than the sum of its proper divisors (1).

646453 is an equidigital number, since it uses as much as digits as its factorization.

646453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 28.

The square root of 646453 is about 804.0230096210. The cubic root of 646453 is about 86.4660563802.

The spelling of 646453 in words is "six hundred forty-six thousand, four hundred fifty-three".