168039653 has 2 divisors, whose sum is σ = 168039654. Its totient is φ = 168039652.

The previous prime is 168039637. The next prime is 168039719. The reversal of 168039653 is 356930861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155201764 + 12837889 = 12458^2 + 3583^2 .

It is a cyclic number.

It is not a de Polignac number, because 168039653 - 2⁴ = 168039637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 168039653.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168032653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84019826 + 84019827.

It is an arithmetic number, because the mean of its divisors is an integer number (84019827).

Almost surely, 2^168039653 is an apocalyptic number.

It is an amenable number.

168039653 is a deficient number, since it is larger than the sum of its proper divisors (1).

168039653 is an equidigital number, since it uses as much as digits as its factorization.

168039653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 168039653 is about 12963.0109542498. The cubic root of 168039653 is about 551.8282444089.

The spelling of 168039653 in words is "one hundred sixty-eight million, thirty-nine thousand, six hundred fifty-three".