67221109 has 4 divisors (see below), whose sum is σ = 67267980. Its totient is φ = 67174240.

The previous prime is 67221103. The next prime is 67221127. The reversal of 67221109 is 90112276.

It is a happy number.

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 39025009 + 28196100 = 6247^2 + 5310^2 .

It is a cyclic number.

It is not a de Polignac number, because 67221109 - 2⁷ = 67220981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67221103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21214 + ... + 24175.

It is an arithmetic number, because the mean of its divisors is an integer number (16816995).

Almost surely, 2^67221109 is an apocalyptic number.

It is an amenable number.

67221109 is a deficient number, since it is larger than the sum of its proper divisors (46871).

67221109 is a wasteful number, since it uses less digits than its factorization.

67221109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46870.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 67221109 is about 8198.8480288392. The cubic root of 67221109 is about 406.6011079334.

The spelling of 67221109 in words is "sixty-seven million, two hundred twenty-one thousand, one hundred nine".