68617307 has 4 divisors (see below), whose sum is σ = 74855256. Its totient is φ = 62379360.

The previous prime is 68617301. The next prime is 68617319. The reversal of 68617307 is 70371686.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68617307 - 2¹⁰ = 68616283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68617301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3118958 + ... + 3118979.

It is an arithmetic number, because the mean of its divisors is an integer number (18713814).

Almost surely, 2^68617307 is an apocalyptic number.

68617307 is a deficient number, since it is larger than the sum of its proper divisors (6237949).

68617307 is a wasteful number, since it uses less digits than its factorization.

68617307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6237948.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 68617307 is about 8283.5564222138. The cubic root of 68617307 is about 409.3969062885.

The spelling of 68617307 in words is "sixty-eight million, six hundred seventeen thousand, three hundred seven".