67820913 has 24 divisors (see below), whose sum is σ = 100183200. Its totient is φ = 44198784.

The previous prime is 67820903. The next prime is 67820923. The reversal of 67820913 is 31902876.

It is an interprime number because it is at equal distance from previous prime (67820903) and next prime (67820923).

It is not a de Polignac number, because 67820913 - 2⁶ = 67820849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67820903) 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, 178758 + ... + 179136.

It is an arithmetic number, because the mean of its divisors is an integer number (4174300).

Almost surely, 2^67820913 is an apocalyptic number.

It is an amenable number.

67820913 is a deficient number, since it is larger than the sum of its proper divisors (32362287).

67820913 is a wasteful number, since it uses less digits than its factorization.

67820913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781 (or 778 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 67820913 is about 8235.3453479499. The cubic root of 67820913 is about 407.8068758726.

The spelling of 67820913 in words is "sixty-seven million, eight hundred twenty thousand, nine hundred thirteen".