68202493 has 4 divisors (see below), whose sum is σ = 68304508. Its totient is φ = 68100480.

The previous prime is 68202451. The next prime is 68202509. The reversal of 68202493 is 39420286.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44796249 + 23406244 = 6693^2 + 4838^2 .

It is a cyclic number.

It is not a de Polignac number, because 68202493 - 2⁹ = 68201981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68202413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49998 + ... + 51343.

It is an arithmetic number, because the mean of its divisors is an integer number (17076127).

Almost surely, 2^68202493 is an apocalyptic number.

It is an amenable number.

68202493 is a deficient number, since it is larger than the sum of its proper divisors (102015).

68202493 is a wasteful number, since it uses less digits than its factorization.

68202493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102014.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 68202493 is about 8258.4800659686. The cubic root of 68202493 is about 408.5702589859.

The spelling of 68202493 in words is "sixty-eight million, two hundred two thousand, four hundred ninety-three".