68920013 has 8 divisors (see below), whose sum is σ = 70725600. Its totient is φ = 67123728.

The previous prime is 68920009. The next prime is 68920051. The reversal of 68920013 is 31002986.

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

It is a cyclic number.

It is not a de Polignac number, because 68920013 - 2² = 68920009 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68920003) 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, 14183 + ... + 18411.

It is an arithmetic number, because the mean of its divisors is an integer number (8840700).

Almost surely, 2^68920013 is an apocalyptic number.

It is an amenable number.

68920013 is a deficient number, since it is larger than the sum of its proper divisors (1805587).

68920013 is a wasteful number, since it uses less digits than its factorization.

68920013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4651.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 68920013 is about 8301.8078151689. The cubic root of 68920013 is about 409.9980428223.

Adding to 68920013 its reverse (31002986), we get a palindrome (99922999).

It can be divided in two parts, 689 and 20013, that added together give a palindrome (20702).

The spelling of 68920013 in words is "sixty-eight million, nine hundred twenty thousand, thirteen".