68354281 has 4 divisors (see below), whose sum is σ = 70201732. Its totient is φ = 66506832.

The previous prime is 68354233. The next prime is 68354291. The reversal of 68354281 is 18245386.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65464281 + 2890000 = 8091^2 + 1700^2 .

It is a cyclic number.

It is not a de Polignac number, because 68354281 - 2¹¹ = 68352233 is a prime.

It is a super-2 number, since 2×68354281² = 9344615462053922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 1847413 = 68354281 / (6 + 8 + 3 + 5 + 4 + 2 + 8 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68354281.

It is not an unprimeable number, because it can be changed into a prime (68354291) 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, 923670 + ... + 923743.

It is an arithmetic number, because the mean of its divisors is an integer number (17550433).

Almost surely, 2^68354281 is an apocalyptic number.

It is an amenable number.

68354281 is a deficient number, since it is larger than the sum of its proper divisors (1847451).

68354281 is a wasteful number, since it uses less digits than its factorization.

68354281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1847450.

The product of its digits is 46080, while the sum is 37.

The square root of 68354281 is about 8267.6647851736. The cubic root of 68354281 is about 408.8731321408.

It can be divided in two parts, 68354 and 281, that added together give a triangular number (68635 = T₃₇₀).

The spelling of 68354281 in words is "sixty-eight million, three hundred fifty-four thousand, two hundred eighty-one".