67540413 has 16 divisors (see below), whose sum is σ = 93181952. Its totient is φ = 43470000.

The previous prime is 67540399. The next prime is 67540423. The reversal of 67540413 is 31404576.

It is not a de Polignac number, because 67540413 - 2⁵ = 67540381 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67540423) 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 15 ways as a sum of consecutive naturals, for example, 63738 + ... + 64788.

It is an arithmetic number, because the mean of its divisors is an integer number (5823872).

Almost surely, 2^67540413 is an apocalyptic number.

It is an amenable number.

67540413 is a deficient number, since it is larger than the sum of its proper divisors (25641539).

67540413 is a wasteful number, since it uses less digits than its factorization.

67540413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1776.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 67540413 is about 8218.2974514190. The cubic root of 67540413 is about 407.2438838774.

Adding to 67540413 its reverse (31404576), we get a palindrome (98944989).

The spelling of 67540413 in words is "sixty-seven million, five hundred forty thousand, four hundred thirteen".