67998393 has 16 divisors (see below), whose sum is σ = 101684160. Its totient is φ = 44906688.

The previous prime is 67998389. The next prime is 67998409. The reversal of 67998393 is 39389976.

It is not a de Polignac number, because 67998393 - 2² = 67998389 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67998313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8880 + ... + 14657.

It is an arithmetic number, because the mean of its divisors is an integer number (6355260).

Almost surely, 2^67998393 is an apocalyptic number.

It is an amenable number.

67998393 is a deficient number, since it is larger than the sum of its proper divisors (33685767).

67998393 is a wasteful number, since it uses less digits than its factorization.

67998393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23653 (or 23647 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 54.

The square root of 67998393 is about 8246.1138119723. The cubic root of 67998393 is about 408.1622948626.

The spelling of 67998393 in words is "sixty-seven million, nine hundred ninety-eight thousand, three hundred ninety-three".