68643133 has 8 divisors (see below), whose sum is σ = 73993248. Its totient is φ = 63303024.

The previous prime is 68643131. The next prime is 68643139. The reversal of 68643133 is 33134686.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68643133 - 2¹ = 68643131 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 (68643131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18066 + ... + 21532.

It is an arithmetic number, because the mean of its divisors is an integer number (9249156).

Almost surely, 2^68643133 is an apocalyptic number.

It is an amenable number.

68643133 is a deficient number, since it is larger than the sum of its proper divisors (5350115).

68643133 is a wasteful number, since it uses less digits than its factorization.

68643133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5003.

The product of its digits is 31104, while the sum is 34.

The square root of 68643133 is about 8285.1151470574. The cubic root of 68643133 is about 409.4482624198.

The spelling of 68643133 in words is "sixty-eight million, six hundred forty-three thousand, one hundred thirty-three".