68211386 has 4 divisors (see below), whose sum is σ = 102317082. Its totient is φ = 34105692.

The previous prime is 68211383. The next prime is 68211397. The reversal of 68211386 is 68311286.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68311286 = 2 ⋅34155643.

It can be written as a sum of positive squares in only one way, i.e., 67980025 + 231361 = 8245^2 + 481^2 .

It is not an unprimeable number, because it can be changed into a prime (68211383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17052845 + ... + 17052848.

Almost surely, 2^68211386 is an apocalyptic number.

68211386 is a deficient number, since it is larger than the sum of its proper divisors (34105696).

68211386 is a wasteful number, since it uses less digits than its factorization.

68211386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34105695.

The product of its digits is 13824, while the sum is 35.

The square root of 68211386 is about 8259.0184646845. The cubic root of 68211386 is about 408.5880161931.

The spelling of 68211386 in words is "sixty-eight million, two hundred eleven thousand, three hundred eighty-six".