68491727 has 4 divisors (see below), whose sum is σ = 68744736. Its totient is φ = 68238720.

The previous prime is 68491711. The next prime is 68491757. The reversal of 68491727 is 72719486.

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 68491727 - 2⁴ = 68491711 is a prime.

It is a super-2 number, since 2×68491727² = 9382233334885058, which contains 22 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 (68491757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126098 + ... + 126639.

It is an arithmetic number, because the mean of its divisors is an integer number (17186184).

Almost surely, 2^68491727 is an apocalyptic number.

68491727 is a deficient number, since it is larger than the sum of its proper divisors (253009).

68491727 is a wasteful number, since it uses less digits than its factorization.

68491727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253008.

The product of its digits is 169344, while the sum is 44.

The square root of 68491727 is about 8275.9728733243. The cubic root of 68491727 is about 409.1470011182.

The spelling of 68491727 in words is "sixty-eight million, four hundred ninety-one thousand, seven hundred twenty-seven".