67223509 has 4 divisors (see below), whose sum is σ = 67316704. Its totient is φ = 67130316.

The previous prime is 67223473. The next prime is 67223521. The reversal of 67223509 is 90532276.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 67223509 - 2⁷ = 67223381 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 (67223599) 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, 45507 + ... + 46960.

It is an arithmetic number, because the mean of its divisors is an integer number (16829176).

Almost surely, 2^67223509 is an apocalyptic number.

It is an amenable number.

67223509 is a deficient number, since it is larger than the sum of its proper divisors (93195).

67223509 is an equidigital number, since it uses as much as digits as its factorization.

67223509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93194.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 67223509 is about 8198.9943895578. The cubic root of 67223509 is about 406.6059468452.

The spelling of 67223509 in words is "sixty-seven million, two hundred twenty-three thousand, five hundred nine".