67830521 has 8 divisors (see below), whose sum is σ = 74081088. Its totient is φ = 61594000.

The previous prime is 67830467. The next prime is 67830533. The reversal of 67830521 is 12503876.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 67830521 - 2⁶ = 67830457 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67830571) 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 7 ways as a sum of consecutive naturals, for example, 8351 + ... + 14331.

It is an arithmetic number, because the mean of its divisors is an integer number (9260136).

Almost surely, 2^67830521 is an apocalyptic number.

It is an amenable number.

67830521 is a deficient number, since it is larger than the sum of its proper divisors (6250567).

67830521 is a wasteful number, since it uses less digits than its factorization.

67830521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7023.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 67830521 is about 8235.9286665196. The cubic root of 67830521 is about 407.8261325850.

The spelling of 67830521 in words is "sixty-seven million, eight hundred thirty thousand, five hundred twenty-one".