68351647 has 16 divisors (see below), whose sum is σ = 84324352. Its totient is φ = 53952480.

The previous prime is 68351641. The next prime is 68351663. The reversal of 68351647 is 74615386.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 68351647 - 2⁷ = 68351519 is a prime.

It is a super-2 number, since 2×68351647² = 9343895295225218, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68351641) 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, 62338 + ... + 63424.

It is an arithmetic number, because the mean of its divisors is an integer number (5270272).

Almost surely, 2^68351647 is an apocalyptic number.

68351647 is a deficient number, since it is larger than the sum of its proper divisors (15972705).

68351647 is a wasteful number, since it uses less digits than its factorization.

68351647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1798.

The product of its digits is 120960, while the sum is 40.

The square root of 68351647 is about 8267.5054883562. The cubic root of 68351647 is about 408.8678801622.

The spelling of 68351647 in words is "sixty-eight million, three hundred fifty-one thousand, six hundred forty-seven".