68641807 has 4 divisors (see below), whose sum is σ = 73921960. Its totient is φ = 63361656.

The previous prime is 68641799. The next prime is 68641829. The reversal of 68641807 is 70814686.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70814686 = 2 ⋅35407343.

It is a cyclic number.

It is not a de Polignac number, because 68641807 - 2³ = 68641799 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68641807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68641847) 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, 2640057 + ... + 2640082.

It is an arithmetic number, because the mean of its divisors is an integer number (18480490).

Almost surely, 2^68641807 is an apocalyptic number.

68641807 is a deficient number, since it is larger than the sum of its proper divisors (5280153).

68641807 is a wasteful number, since it uses less digits than its factorization.

68641807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5280152.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 68641807 is about 8285.0351236431. The cubic root of 68641807 is about 409.4456259245.

The spelling of 68641807 in words is "sixty-eight million, six hundred forty-one thousand, eight hundred seven".