68918507 has 4 divisors (see below), whose sum is σ = 78764016. Its totient is φ = 59073000.

The previous prime is 68918501. The next prime is 68918513. The reversal of 68918507 is 70581986.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (68918501) and next prime (68918513).

It is not a de Polignac number, because 68918507 - 2¹⁸ = 68656363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68918501) 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, 4922744 + ... + 4922757.

It is an arithmetic number, because the mean of its divisors is an integer number (19691004).

Almost surely, 2^68918507 is an apocalyptic number.

68918507 is a deficient number, since it is larger than the sum of its proper divisors (9845509).

68918507 is an equidigital number, since it uses as much as digits as its factorization.

68918507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9845508.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 68918507 is about 8301.7171115378. The cubic root of 68918507 is about 409.9950564544.

The spelling of 68918507 in words is "sixty-eight million, nine hundred eighteen thousand, five hundred seven".