68780417 has 4 divisors (see below), whose sum is σ = 69411540. Its totient is φ = 68149296.

The previous prime is 68780401. The next prime is 68780461. The reversal of 68780417 is 71408786.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71408786 = 2 ⋅35704393.

It can be written as a sum of positive squares in 2 ways, for example, as 29855296 + 38925121 = 5464^2 + 6239^2 .

It is a cyclic number.

It is not a de Polignac number, because 68780417 - 2⁴ = 68780401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68780477) 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, 315398 + ... + 315615.

It is an arithmetic number, because the mean of its divisors is an integer number (17352885).

Almost surely, 2^68780417 is an apocalyptic number.

It is an amenable number.

68780417 is a deficient number, since it is larger than the sum of its proper divisors (631123).

68780417 is a wasteful number, since it uses less digits than its factorization.

68780417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631122.

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 68780417 is about 8293.3959871696. The cubic root of 68780417 is about 409.7210416535.

The spelling of 68780417 in words is "sixty-eight million, seven hundred eighty thousand, four hundred seventeen".