68030381 has 4 divisors (see below), whose sum is σ = 68272764. Its totient is φ = 67788000.

The previous prime is 68030371. The next prime is 68030401. The reversal of 68030381 is 18303086.

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 38502025 + 29528356 = 6205^2 + 5434^2 .

It is a cyclic number.

It is not a de Polignac number, because 68030381 - 2¹⁴ = 68013997 is a prime.

It is a super-2 number, since 2×68030381² = 9256265478010322, 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 (68030321) 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, 120770 + ... + 121331.

It is an arithmetic number, because the mean of its divisors is an integer number (17068191).

Almost surely, 2^68030381 is an apocalyptic number.

It is an amenable number.

68030381 is a deficient number, since it is larger than the sum of its proper divisors (242383).

68030381 is a wasteful number, since it uses less digits than its factorization.

68030381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242382.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 68030381 is about 8248.0531642322. The cubic root of 68030381 is about 408.2262877901.

The spelling of 68030381 in words is "sixty-eight million, thirty thousand, three hundred eighty-one".