68940259 has 4 divisors (see below), whose sum is σ = 69185880. Its totient is φ = 68694640.

The previous prime is 68940257. The next prime is 68940271. The reversal of 68940259 is 95204986.

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

It is a cyclic number.

It is not a de Polignac number, because 68940259 - 2¹ = 68940257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68940257) 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, 122389 + ... + 122950.

It is an arithmetic number, because the mean of its divisors is an integer number (17296470).

Almost surely, 2^68940259 is an apocalyptic number.

68940259 is a deficient number, since it is larger than the sum of its proper divisors (245621).

68940259 is a wasteful number, since it uses less digits than its factorization.

68940259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245620.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 68940259 is about 8303.0270985948. The cubic root of 68940259 is about 410.0381860131.

The spelling of 68940259 in words is "sixty-eight million, nine hundred forty thousand, two hundred fifty-nine".