68621684 has 6 divisors (see below), whose sum is σ = 120087954. Its totient is φ = 34310840.

The previous prime is 68621681. The next prime is 68621687. The reversal of 68621684 is 48612686.

It is an interprime number because it is at equal distance from previous prime (68621681) and next prime (68621687).

It can be written as a sum of positive squares in only one way, i.e., 61277584 + 7344100 = 7828^2 + 2710^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68621681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8577707 + ... + 8577714.

It is an arithmetic number, because the mean of its divisors is an integer number (20014659).

Almost surely, 2^68621684 is an apocalyptic number.

It is an amenable number.

68621684 is a deficient number, since it is larger than the sum of its proper divisors (51466270).

68621684 is a wasteful number, since it uses less digits than its factorization.

68621684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17155425 (or 17155423 counting only the distinct ones).

The product of its digits is 110592, while the sum is 41.

The square root of 68621684 is about 8283.8206161167. The cubic root of 68621684 is about 409.4056110513.

The spelling of 68621684 in words is "sixty-eight million, six hundred twenty-one thousand, six hundred eighty-four".