68900013 has 24 divisors (see below), whose sum is σ = 122490368. Its totient is φ = 36342432.

The previous prime is 68900009. The next prime is 68900017. The reversal of 68900013 is 31000986.

It is an interprime number because it is at equal distance from previous prime (68900009) and next prime (68900017).

It is not a de Polignac number, because 68900013 - 2² = 68900009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68900013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68900017) 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 23 ways as a sum of consecutive naturals, for example, 41245 + ... + 42882.

Almost surely, 2^68900013 is an apocalyptic number.

68900013 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

68900013 is a deficient number, since it is larger than the sum of its proper divisors (53590355).

68900013 is a wasteful number, since it uses less digits than its factorization.

68900013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84153 (or 84150 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 68900013 is about 8300.6031708545. The cubic root of 68900013 is about 409.9583796736.

Adding to 68900013 its reverse (31000986), we get a palindrome (99900999).

The spelling of 68900013 in words is "sixty-eight million, nine hundred thousand, thirteen".