68211959 has 4 divisors (see below), whose sum is σ = 68263440. Its totient is φ = 68160480.

The previous prime is 68211953. The next prime is 68211961. The reversal of 68211959 is 95911286.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95911286 = 2 ⋅47955643.

It is a cyclic number.

It is not a de Polignac number, because 68211959 - 2¹⁶ = 68146423 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 (68211953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23699 + ... + 26420.

It is an arithmetic number, because the mean of its divisors is an integer number (17065860).

Almost surely, 2^68211959 is an apocalyptic number.

68211959 is a deficient number, since it is larger than the sum of its proper divisors (51481).

68211959 is a wasteful number, since it uses less digits than its factorization.

68211959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51480.

The product of its digits is 38880, while the sum is 41.

The square root of 68211959 is about 8259.0531539638. The cubic root of 68211959 is about 408.5891602850.

The spelling of 68211959 in words is "sixty-eight million, two hundred eleven thousand, nine hundred fifty-nine".