67999013 has 4 divisors (see below), whose sum is σ = 68859840. Its totient is φ = 67138188.

The previous prime is 67999003. The next prime is 67999021. The reversal of 67999013 is 31099976.

It is a happy number.

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 not a de Polignac number, because 67999013 - 2⁶ = 67998949 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 (67999003) 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 3 ways as a sum of consecutive naturals, for example, 430295 + ... + 430452.

It is an arithmetic number, because the mean of its divisors is an integer number (17214960).

Almost surely, 2^67999013 is an apocalyptic number.

It is an amenable number.

67999013 is a deficient number, since it is larger than the sum of its proper divisors (860827).

67999013 is an equidigital number, since it uses as much as digits as its factorization.

67999013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860826.

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 67999013 is about 8246.1514053527. The cubic root of 67999013 is about 408.1635353814.

The spelling of 67999013 in words is "sixty-seven million, nine hundred ninety-nine thousand, thirteen".