68534381 has 4 divisors (see below), whose sum is σ = 68795232. Its totient is φ = 68273532.

The previous prime is 68534369. The next prime is 68534399. The reversal of 68534381 is 18343586.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68534381 is a prime.

It is a super-2 number, since 2×68534381² = 9393922758106322, 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 (68534351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130031 + ... + 130556.

It is an arithmetic number, because the mean of its divisors is an integer number (17198808).

Almost surely, 2^68534381 is an apocalyptic number.

It is an amenable number.

68534381 is a deficient number, since it is larger than the sum of its proper divisors (260851).

68534381 is a wasteful number, since it uses less digits than its factorization.

68534381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260850.

The product of its digits is 69120, while the sum is 38.

The square root of 68534381 is about 8278.5494502358. The cubic root of 68534381 is about 409.2319171387.

The spelling of 68534381 in words is "sixty-eight million, five hundred thirty-four thousand, three hundred eighty-one".