67568913 has 6 divisors (see below), whose sum is σ = 97599554. Its totient is φ = 45045936.

The previous prime is 67568857. The next prime is 67568923. The reversal of 67568913 is 31986576.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 46335249 + 21233664 = 6807^2 + 4608^2 .

It is not a de Polignac number, because 67568913 - 2⁶ = 67568849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67568923) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3753820 + ... + 3753837.

Almost surely, 2^67568913 is an apocalyptic number.

It is an amenable number.

67568913 is a deficient number, since it is larger than the sum of its proper divisors (30030641).

67568913 is a wasteful number, since it uses less digits than its factorization.

67568913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7507663 (or 7507660 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 67568913 is about 8220.0312043203. The cubic root of 67568913 is about 407.3011573331.

The spelling of 67568913 in words is "sixty-seven million, five hundred sixty-eight thousand, nine hundred thirteen".