67438453 has 4 divisors (see below), whose sum is σ = 67589100. Its totient is φ = 67287808.

The previous prime is 67438447. The next prime is 67438477. The reversal of 67438453 is 35483476.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37920964 + 29517489 = 6158^2 + 5433^2 .

It is a cyclic number.

It is not a de Polignac number, because 67438453 - 2⁵ = 67438421 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67438403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74650 + ... + 75547.

It is an arithmetic number, because the mean of its divisors is an integer number (16897275).

Almost surely, 2^67438453 is an apocalyptic number.

It is an amenable number.

67438453 is a deficient number, since it is larger than the sum of its proper divisors (150647).

67438453 is a wasteful number, since it uses less digits than its factorization.

67438453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150646.

The product of its digits is 241920, while the sum is 40.

The square root of 67438453 is about 8212.0918772259. The cubic root of 67438453 is about 407.0388535532.

The spelling of 67438453 in words is "sixty-seven million, four hundred thirty-eight thousand, four hundred fifty-three".