67563609 has 4 divisors (see below), whose sum is σ = 90084816. Its totient is φ = 45042404.

The previous prime is 67563589. The next prime is 67563623. The reversal of 67563609 is 90636576.

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 67563609 - 2⁷ = 67563481 is a prime.

It is a super-2 number, since 2×67563609² = 9129682522209762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (67563679) 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, 11260599 + ... + 11260604.

It is an arithmetic number, because the mean of its divisors is an integer number (22521204).

Almost surely, 2^67563609 is an apocalyptic number.

It is an amenable number.

67563609 is a deficient number, since it is larger than the sum of its proper divisors (22521207).

67563609 is a wasteful number, since it uses less digits than its factorization.

67563609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22521206.

The product of its (nonzero) digits is 204120, while the sum is 42.

The square root of 67563609 is about 8219.7085714762. The cubic root of 67563609 is about 407.2904996614.

The spelling of 67563609 in words is "sixty-seven million, five hundred sixty-three thousand, six hundred nine".