816653 has 2 divisors, whose sum is σ = 816654. Its totient is φ = 816652.

The previous prime is 816649. The next prime is 816667. The reversal of 816653 is 356618.

816653 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 769129 + 47524 = 877^2 + 218^2 .

It is a cyclic number.

It is not a de Polignac number, because 816653 - 2² = 816649 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (816353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408326 + 408327.

It is an arithmetic number, because the mean of its divisors is an integer number (408327).

2⁸¹⁶⁶⁵³ is an apocalyptic number.

It is an amenable number.

816653 is a deficient number, since it is larger than the sum of its proper divisors (1).

816653 is an equidigital number, since it uses as much as digits as its factorization.

816653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 29.

The square root of 816653 is about 903.6885525445. The cubic root of 816653 is about 93.4714946420.

It can be divided in two parts, 8 and 16653, that added together give a palindrome (16661).

The spelling of 816653 in words is "eight hundred sixteen thousand, six hundred fifty-three".