67440993 has 8 divisors (see below), whose sum is σ = 90568800. Its totient is φ = 44636928.

The previous prime is 67440959. The next prime is 67441009. The reversal of 67440993 is 39904476.

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

It is not a de Polignac number, because 67440993 - 2¹⁶ = 67375457 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (67440943) 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, 80448 + ... + 81281.

It is an arithmetic number, because the mean of its divisors is an integer number (11321100).

Almost surely, 2^67440993 is an apocalyptic number.

It is an amenable number.

67440993 is a deficient number, since it is larger than the sum of its proper divisors (23127807).

67440993 is a wasteful number, since it uses less digits than its factorization.

67440993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161871.

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 67440993 is about 8212.2465257687. The cubic root of 67440993 is about 407.0439637224.

The spelling of 67440993 in words is "sixty-seven million, four hundred forty thousand, nine hundred ninety-three".