68304513 has 8 divisors (see below), whose sum is σ = 91576576. Its totient is φ = 45284400.

The previous prime is 68304499. The next prime is 68304539. The reversal of 68304513 is 31540386.

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

It is not a de Polignac number, because 68304513 - 2⁹ = 68304001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68304013) 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, 62353 + ... + 63438.

It is an arithmetic number, because the mean of its divisors is an integer number (11447072).

Almost surely, 2^68304513 is an apocalyptic number.

It is an amenable number.

68304513 is a deficient number, since it is larger than the sum of its proper divisors (23272063).

68304513 is a wasteful number, since it uses less digits than its factorization.

68304513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125975.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 68304513 is about 8264.6544392370. The cubic root of 68304513 is about 408.7738760380.

Adding to 68304513 its reverse (31540386), we get a palindrome (99844899).

The spelling of 68304513 in words is "sixty-eight million, three hundred four thousand, five hundred thirteen".