68304533 has 4 divisors (see below), whose sum is σ = 74514048. Its totient is φ = 62095020.

The previous prime is 68304499. The next prime is 68304539. The reversal of 68304533 is 33540386.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68304533 - 2⁶ = 68304469 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68304533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68304539) 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, 3104741 + ... + 3104762.

It is an arithmetic number, because the mean of its divisors is an integer number (18628512).

Almost surely, 2^68304533 is an apocalyptic number.

It is an amenable number.

68304533 is a deficient number, since it is larger than the sum of its proper divisors (6209515).

68304533 is a wasteful number, since it uses less digits than its factorization.

68304533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6209514.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 68304533 is about 8264.6556492089. The cubic root of 68304533 is about 408.7739159352.

The spelling of 68304533 in words is "sixty-eight million, three hundred four thousand, five hundred thirty-three".