68989636 has 9 divisors (see below), whose sum is σ = 120760941. Its totient is φ = 34486512.

The previous prime is 68989633. The next prime is 68989639. The reversal of 68989636 is 63698986.

The square root of 68989636 is 8306.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (68989633) and next prime (68989639).

It can be written as a sum of positive squares in only one way, i.e., 828100 + 68161536 = 910^2 + 8256^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68989631) 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 2 ways as a sum of consecutive naturals, for example, 14536 + ... + 18688.

Almost surely, 2^68989636 is an apocalyptic number.

68989636 is the 8306-th square number.

It is an amenable number.

68989636 is a deficient number, since it is larger than the sum of its proper divisors (51771305).

68989636 is an frugal number, since it uses more digits than its factorization.

68989636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8310 (or 4155 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 55.

The cubic root of 68989636 is about 410.1360563723.

The spelling of 68989636 in words is "sixty-eight million, nine hundred eighty-nine thousand, six hundred thirty-six".