68685971 has 8 divisors (see below), whose sum is σ = 70156800. Its totient is φ = 67225480.

The previous prime is 68685961. The next prime is 68685989. The reversal of 68685971 is 17958686.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68685971 - 2⁶ = 68685907 is a prime.

It is a super-2 number, since 2×68685971² = 9435525224425682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68685961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11666 + ... + 16536.

It is an arithmetic number, because the mean of its divisors is an integer number (8769600).

Almost surely, 2^68685971 is an apocalyptic number.

68685971 is a deficient number, since it is larger than the sum of its proper divisors (1470829).

68685971 is a wasteful number, since it uses less digits than its factorization.

68685971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5169.

The product of its digits is 725760, while the sum is 50.

The square root of 68685971 is about 8287.6999825042. The cubic root of 68685971 is about 409.5334192614.

The spelling of 68685971 in words is "sixty-eight million, six hundred eighty-five thousand, nine hundred seventy-one".