68720313 has 8 divisors (see below), whose sum is σ = 92211328. Its totient is φ = 45521424.

The previous prime is 68720293. The next prime is 68720347. The reversal of 68720313 is 31302786.

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

It is not a de Polignac number, because 68720313 - 2¹³ = 68712121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68720213) 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, 72481 + ... + 73422.

It is an arithmetic number, because the mean of its divisors is an integer number (11526416).

Almost surely, 2^68720313 is an apocalyptic number.

It is an amenable number.

68720313 is a deficient number, since it is larger than the sum of its proper divisors (23491015).

68720313 is a wasteful number, since it uses less digits than its factorization.

68720313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146063.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 68720313 is about 8289.7715891332. The cubic root of 68720313 is about 409.6016615005.

The spelling of 68720313 in words is "sixty-eight million, seven hundred twenty thousand, three hundred thirteen".