68705401 has 4 divisors (see below), whose sum is σ = 68727204. Its totient is φ = 68683600.

The previous prime is 68705389. The next prime is 68705407. The reversal of 68705401 is 10450786.

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

It can be written as a sum of positive squares in 2 ways, for example, as 65999376 + 2706025 = 8124^2 + 1645^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68705401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68705407) 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, 5170 + ... + 12811.

It is an arithmetic number, because the mean of its divisors is an integer number (17181801).

Almost surely, 2^68705401 is an apocalyptic number.

It is an amenable number.

68705401 is a deficient number, since it is larger than the sum of its proper divisors (21803).

68705401 is a wasteful number, since it uses less digits than its factorization.

68705401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21802.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 68705401 is about 8288.8721186902. The cubic root of 68705401 is about 409.5720321156.

The spelling of 68705401 in words is "sixty-eight million, seven hundred five thousand, four hundred one".