68643471 has 16 divisors (see below), whose sum is σ = 100971360. Its totient is φ = 41210880.

The previous prime is 68643461. The next prime is 68643479. The reversal of 68643471 is 17434686.

It is not a de Polignac number, because 68643471 - 2¹⁷ = 68512399 is a prime.

It is a super-3 number, since 3×68643471³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68643479) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19866 + ... + 23063.

It is an arithmetic number, because the mean of its divisors is an integer number (6310710).

Almost surely, 2^68643471 is an apocalyptic number.

68643471 is a deficient number, since it is larger than the sum of its proper divisors (32327889).

68643471 is a wasteful number, since it uses less digits than its factorization.

68643471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42986.

The product of its digits is 96768, while the sum is 39.

The square root of 68643471 is about 8285.1355450590. The cubic root of 68643471 is about 409.4489344622.

The spelling of 68643471 in words is "sixty-eight million, six hundred forty-three thousand, four hundred seventy-one".