67800013 has 4 divisors (see below), whose sum is σ = 68216128. Its totient is φ = 67383900.

The previous prime is 67800001. The next prime is 67800023. The reversal of 67800013 is 31000876.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67800013 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 (67800023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207813 + ... + 208138.

It is an arithmetic number, because the mean of its divisors is an integer number (17054032).

Almost surely, 2^67800013 is an apocalyptic number.

It is an amenable number.

67800013 is a deficient number, since it is larger than the sum of its proper divisors (416115).

67800013 is a wasteful number, since it uses less digits than its factorization.

67800013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416114.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 67800013 is about 8234.0763294980. The cubic root of 67800013 is about 407.7649810303.

Adding to 67800013 its reverse (31000876), we get a palindrome (98800889).

The spelling of 67800013 in words is "sixty-seven million, eight hundred thousand, thirteen".