68201986 has 4 divisors (see below), whose sum is σ = 102302982. Its totient is φ = 34100992.

The previous prime is 68201981. The next prime is 68202041. The reversal of 68201986 is 68910286.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68910286 = 2 ⋅34455143.

It can be written as a sum of positive squares in only one way, i.e., 65205625 + 2996361 = 8075^2 + 1731^2 .

It is not an unprimeable number, because it can be changed into a prime (68201981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17050495 + ... + 17050498.

Almost surely, 2^68201986 is an apocalyptic number.

68201986 is a deficient number, since it is larger than the sum of its proper divisors (34100996).

68201986 is a wasteful number, since it uses less digits than its factorization.

68201986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34100995.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 68201986 is about 8258.4493701905. The cubic root of 68201986 is about 408.5692465809.

The spelling of 68201986 in words is "sixty-eight million, two hundred one thousand, nine hundred eighty-six".