68315807 has 4 divisors (see below), whose sum is σ = 78075216. Its totient is φ = 58556400.

The previous prime is 68315771. The next prime is 68315831. The reversal of 68315807 is 70851386.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70851386 = 2 ⋅35425693.

It is not a de Polignac number, because 68315807 - 2¹⁴ = 68299423 is a prime.

It is a super-2 number, since 2×68315807² = 9334098972122498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68315837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4879694 + ... + 4879707.

It is an arithmetic number, because the mean of its divisors is an integer number (19518804).

Almost surely, 2^68315807 is an apocalyptic number.

68315807 is a deficient number, since it is larger than the sum of its proper divisors (9759409).

68315807 is an equidigital number, since it uses as much as digits as its factorization.

68315807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9759408.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 68315807 is about 8265.3376821519. The cubic root of 68315807 is about 408.7964047482.

The spelling of 68315807 in words is "sixty-eight million, three hundred fifteen thousand, eight hundred seven".