67997407 has 8 divisors (see below), whose sum is σ = 71645184. Its totient is φ = 64407288.

The previous prime is 67997401. The next prime is 67997417. The reversal of 67997407 is 70479976.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67997407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67997401) 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, 11983 + ... + 16720.

It is an arithmetic number, because the mean of its divisors is an integer number (8955648).

Almost surely, 2^67997407 is an apocalyptic number.

67997407 is a deficient number, since it is larger than the sum of its proper divisors (3647777).

67997407 is a wasteful number, since it uses less digits than its factorization.

67997407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28829.

The product of its (nonzero) digits is 666792, while the sum is 49.

The square root of 67997407 is about 8246.0540260175. The cubic root of 67997407 is about 408.1603220220.

The spelling of 67997407 in words is "sixty-seven million, nine hundred ninety-seven thousand, four hundred seven".