68521471 has 8 divisors (see below), whose sum is σ = 69555200. Its totient is φ = 67495032.

The previous prime is 68521463. The next prime is 68521477. The reversal of 68521471 is 17412586.

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 68521471 - 2³ = 68521463 is a prime.

It is a super-3 number, since 3×68521471³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68521477) 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, 18826 + ... + 22168.

It is an arithmetic number, because the mean of its divisors is an integer number (8694400).

Almost surely, 2^68521471 is an apocalyptic number.

68521471 is a deficient number, since it is larger than the sum of its proper divisors (1033729).

68521471 is a wasteful number, since it uses less digits than its factorization.

68521471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3645.

The product of its digits is 13440, while the sum is 34.

The square root of 68521471 is about 8277.7696875427. The cubic root of 68521471 is about 409.2062194974.

The spelling of 68521471 in words is "sixty-eight million, five hundred twenty-one thousand, four hundred seventy-one".