68705807 has 4 divisors (see below), whose sum is σ = 71693040. Its totient is φ = 65718576.

The previous prime is 68705783. The next prime is 68705831. The reversal of 68705807 is 70850786.

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 (68705783) and next prime (68705831).

It is a cyclic number.

It is not a de Polignac number, because 68705807 - 2⁶ = 68705743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68705867) 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, 1493582 + ... + 1493627.

It is an arithmetic number, because the mean of its divisors is an integer number (17923260).

Almost surely, 2^68705807 is an apocalyptic number.

68705807 is a deficient number, since it is larger than the sum of its proper divisors (2987233).

68705807 is a wasteful number, since it uses less digits than its factorization.

68705807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2987232.

The product of its (nonzero) digits is 94080, while the sum is 41.

The square root of 68705807 is about 8288.8966093202. The cubic root of 68705807 is about 409.5728388737.

The spelling of 68705807 in words is "sixty-eight million, seven hundred five thousand, eight hundred seven".