653816 has 8 divisors (see below), whose sum is σ = 1225920. Its totient is φ = 326904.

The previous prime is 653801. The next prime is 653819. The reversal of 653816 is 618356.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (653819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40856 + ... + 40871.

It is an arithmetic number, because the mean of its divisors is an integer number (153240).

2⁶⁵³⁸¹⁶ is an apocalyptic number.

It is an amenable number.

653816 is a deficient number, since it is larger than the sum of its proper divisors (572104).

653816 is a wasteful number, since it uses less digits than its factorization.

653816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81733 (or 81729 counting only the distinct ones).

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

The square root of 653816 is about 808.5888943091. The cubic root of 653816 is about 86.7930962109.

The spelling of 653816 in words is "six hundred fifty-three thousand, eight hundred sixteen".