68780423 has 4 divisors (see below), whose sum is σ = 68816928. Its totient is φ = 68743920.

The previous prime is 68780401. The next prime is 68780461. The reversal of 68780423 is 32408786.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32408786 = 2 ⋅16204393.

It is a cyclic number.

It is not a de Polignac number, because 68780423 - 2¹⁴ = 68764039 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 (68780473) 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, 15263 + ... + 19248.

It is an arithmetic number, because the mean of its divisors is an integer number (17204232).

Almost surely, 2^68780423 is an apocalyptic number.

68780423 is a deficient number, since it is larger than the sum of its proper divisors (36505).

68780423 is a wasteful number, since it uses less digits than its factorization.

68780423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36504.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 68780423 is about 8293.3963489031. The cubic root of 68780423 is about 409.7210535674.

The spelling of 68780423 in words is "sixty-eight million, seven hundred eighty thousand, four hundred twenty-three".