1205853653 has 2 divisors, whose sum is σ = 1205853654. Its totient is φ = 1205853652.

The previous prime is 1205853641. The next prime is 1205853659. The reversal of 1205853653 is 3563585021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1119772369 + 86081284 = 33463^2 + 9278^2 .

It is a cyclic number.

It is not a de Polignac number, because 1205853653 - 2¹⁶ = 1205788117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1205853659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602926826 + 602926827.

It is an arithmetic number, because the mean of its divisors is an integer number (602926827).

Almost surely, 2^1205853653 is an apocalyptic number.

It is an amenable number.

1205853653 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205853653 is an equidigital number, since it uses as much as digits as its factorization.

1205853653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108000, while the sum is 38.

The square root of 1205853653 is about 34725.4035685692. The cubic root of 1205853653 is about 1064.3836656618.

The spelling of 1205853653 in words is "one billion, two hundred five million, eight hundred fifty-three thousand, six hundred fifty-three".