67213643 has 24 divisors (see below), whose sum is σ = 80575200. Its totient is φ = 55883520.

The previous prime is 67213609. The next prime is 67213669. The reversal of 67213643 is 34631276.

It is not a de Polignac number, because 67213643 - 2⁶ = 67213579 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 (67213603) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 337658 + ... + 337856.

It is an arithmetic number, because the mean of its divisors is an integer number (3357300).

Almost surely, 2^67213643 is an apocalyptic number.

67213643 is a deficient number, since it is larger than the sum of its proper divisors (13361557).

67213643 is a wasteful number, since it uses less digits than its factorization.

67213643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387 (or 380 counting only the distinct ones).

The product of its digits is 18144, while the sum is 32.

The square root of 67213643 is about 8198.3927083301. The cubic root of 67213643 is about 406.5860541489.

The spelling of 67213643 in words is "sixty-seven million, two hundred thirteen thousand, six hundred forty-three".