68210971 has 4 divisors (see below), whose sum is σ = 68462944. Its totient is φ = 67959000.

The previous prime is 68210963. The next prime is 68211019. The reversal of 68210971 is 17901286.

It is a happy number.

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 68210971 - 2³ = 68210963 is a prime.

It is a super-3 number, since 3×68210971³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68210911) 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, 125580 + ... + 126121.

It is an arithmetic number, because the mean of its divisors is an integer number (17115736).

Almost surely, 2^68210971 is an apocalyptic number.

68210971 is a deficient number, since it is larger than the sum of its proper divisors (251973).

68210971 is a wasteful number, since it uses less digits than its factorization.

68210971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251972.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 68210971 is about 8258.9933405955. The cubic root of 68210971 is about 408.5871875711.

The spelling of 68210971 in words is "sixty-eight million, two hundred ten thousand, nine hundred seventy-one".