67481999 has 8 divisors (see below), whose sum is σ = 72831360. Its totient is φ = 62155296.

The previous prime is 67481987. The next prime is 67482013. The reversal of 67481999 is 99918476.

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 67481999 - 2⁴ = 67481983 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 67481999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67481929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 809 + ... + 11645.

It is an arithmetic number, because the mean of its divisors is an integer number (9103920).

Almost surely, 2^67481999 is an apocalyptic number.

67481999 is a deficient number, since it is larger than the sum of its proper divisors (5349361).

67481999 is a wasteful number, since it uses less digits than its factorization.

67481999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11329.

The product of its digits is 979776, while the sum is 53.

The square root of 67481999 is about 8214.7427835569. The cubic root of 67481999 is about 407.1264450257.

The spelling of 67481999 in words is "sixty-seven million, four hundred eighty-one thousand, nine hundred ninety-nine".