68902543 has 4 divisors (see below), whose sum is σ = 69546600. Its totient is φ = 68258488.

The previous prime is 68902529. The next prime is 68902567. The reversal of 68902543 is 34520986.

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

It is a cyclic number.

It is not a de Polignac number, because 68902543 - 2¹³ = 68894351 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 (68902943) 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, 321868 + ... + 322081.

It is an arithmetic number, because the mean of its divisors is an integer number (17386650).

Almost surely, 2^68902543 is an apocalyptic number.

68902543 is a deficient number, since it is larger than the sum of its proper divisors (644057).

68902543 is a wasteful number, since it uses less digits than its factorization.

68902543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644056.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 68902543 is about 8300.7555680191. The cubic root of 68902543 is about 409.9633974859.

The spelling of 68902543 in words is "sixty-eight million, nine hundred two thousand, five hundred forty-three".