67989381 has 4 divisors (see below), whose sum is σ = 90652512. Its totient is φ = 45326252.

The previous prime is 67989379. The next prime is 67989421. The reversal of 67989381 is 18398976.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 67989381 - 2¹ = 67989379 is a prime.

It is a super-2 number, since 2×67989381² = 9245111857526322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67989371) 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 3 ways as a sum of consecutive naturals, for example, 11331561 + ... + 11331566.

It is an arithmetic number, because the mean of its divisors is an integer number (22663128).

Almost surely, 2^67989381 is an apocalyptic number.

It is an amenable number.

67989381 is a deficient number, since it is larger than the sum of its proper divisors (22663131).

67989381 is a wasteful number, since it uses less digits than its factorization.

67989381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22663130.

The product of its digits is 653184, while the sum is 51.

The square root of 67989381 is about 8245.5673546458. The cubic root of 67989381 is about 408.1442624702.

The spelling of 67989381 in words is "sixty-seven million, nine hundred eighty-nine thousand, three hundred eighty-one".