68529381 has 8 divisors (see below), whose sum is σ = 91538784. Its totient is φ = 45603120.

The previous prime is 68529379. The next prime is 68529403. The reversal of 68529381 is 18392586.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68529381 - 2¹ = 68529379 is a prime.

It is a super-2 number, since 2×68529381² = 9392552120486322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68529301) 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 7 ways as a sum of consecutive naturals, for example, 18835 + ... + 22176.

It is an arithmetic number, because the mean of its divisors is an integer number (11442348).

Almost surely, 2^68529381 is an apocalyptic number.

It is an amenable number.

68529381 is a deficient number, since it is larger than the sum of its proper divisors (23009403).

68529381 is a wasteful number, since it uses less digits than its factorization.

68529381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41571.

The product of its digits is 103680, while the sum is 42.

The square root of 68529381 is about 8278.2474594566. The cubic root of 68529381 is about 409.2219649108.

The spelling of 68529381 in words is "sixty-eight million, five hundred twenty-nine thousand, three hundred eighty-one".