68589731 has 8 divisors (see below), whose sum is σ = 78604800. Its totient is φ = 58628808.

The previous prime is 68589707. The next prime is 68589733. The reversal of 68589731 is 13798586.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-68589731 is a prime.

It is a super-2 number, since 2×68589731² = 9409102397304722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68589733) 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 7 ways as a sum of consecutive naturals, for example, 10781 + ... + 15918.

It is an arithmetic number, because the mean of its divisors is an integer number (9825600).

Almost surely, 2^68589731 is an apocalyptic number.

68589731 is a deficient number, since it is larger than the sum of its proper divisors (10015069).

68589731 is a wasteful number, since it uses less digits than its factorization.

68589731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27073.

The product of its digits is 362880, while the sum is 47.

The square root of 68589731 is about 8281.8917524923. The cubic root of 68589731 is about 409.3420559780.

The spelling of 68589731 in words is "sixty-eight million, five hundred eighty-nine thousand, seven hundred thirty-one".