67998447 has 24 divisors (see below), whose sum is σ = 111121920. Its totient is φ = 41209560.

The previous prime is 67998409. The next prime is 67998449. The reversal of 67998447 is 74489976.

It is a happy number.

It is not a de Polignac number, because 67998447 - 2⁷ = 67998319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 67998393 and 67998402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67998449) 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, 10047 + ... + 15392.

It is an arithmetic number, because the mean of its divisors is an integer number (4630080).

Almost surely, 2^67998447 is an apocalyptic number.

67998447 is a deficient number, since it is larger than the sum of its proper divisors (43123473).

67998447 is a wasteful number, since it uses less digits than its factorization.

67998447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25465 (or 25453 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The square root of 67998447 is about 8246.1170862413. The cubic root of 67998447 is about 408.1624029081.

The spelling of 67998447 in words is "sixty-seven million, nine hundred ninety-eight thousand, four hundred forty-seven".