68505715 has 4 divisors (see below), whose sum is σ = 82206864. Its totient is φ = 54804568.

The previous prime is 68505713. The next prime is 68505727. The reversal of 68505715 is 51750586.

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 68505715 - 2¹ = 68505713 is a prime.

It is a super-2 number, since 2×68505715² = 9386065975322450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68505713) 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, 6850567 + ... + 6850576.

It is an arithmetic number, because the mean of its divisors is an integer number (20551716).

Almost surely, 2^68505715 is an apocalyptic number.

68505715 is a deficient number, since it is larger than the sum of its proper divisors (13701149).

68505715 is a wasteful number, since it uses less digits than its factorization.

68505715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13701148.

The product of its (nonzero) digits is 42000, while the sum is 37.

The square root of 68505715 is about 8276.8179271988. The cubic root of 68505715 is about 409.1748524561.

The spelling of 68505715 in words is "sixty-eight million, five hundred five thousand, seven hundred fifteen".