68651471 has 4 divisors (see below), whose sum is σ = 78458832. Its totient is φ = 58844112.

The previous prime is 68651461. The next prime is 68651477. The reversal of 68651471 is 17415686.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17415686 = 2 ⋅8707843.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68651471 is a prime.

It is a super-3 number, since 3×68651471³ (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 (68651477) 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, 4903670 + ... + 4903683.

It is an arithmetic number, because the mean of its divisors is an integer number (19614708).

Almost surely, 2^68651471 is an apocalyptic number.

68651471 is a deficient number, since it is larger than the sum of its proper divisors (9807361).

68651471 is an equidigital number, since it uses as much as digits as its factorization.

68651471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9807360.

The product of its digits is 40320, while the sum is 38.

The square root of 68651471 is about 8285.6183233359. The cubic root of 68651471 is about 409.4648401469.

The spelling of 68651471 in words is "sixty-eight million, six hundred fifty-one thousand, four hundred seventy-one".