67487409 has 24 divisors (see below), whose sum is σ = 107702400. Its totient is φ = 40379040.

The previous prime is 67487389. The next prime is 67487443. The reversal of 67487409 is 90478476.

It is not a de Polignac number, because 67487409 - 2⁵ = 67487377 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67487309) 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 23 ways as a sum of consecutive naturals, for example, 3507 + ... + 12135.

It is an arithmetic number, because the mean of its divisors is an integer number (4487600).

Almost surely, 2^67487409 is an apocalyptic number.

It is an amenable number.

67487409 is a deficient number, since it is larger than the sum of its proper divisors (40214991).

67487409 is a wasteful number, since it uses less digits than its factorization.

67487409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8725 (or 8722 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 67487409 is about 8215.0720629828. The cubic root of 67487409 is about 407.1373244466.

It can be divided in two parts, 67487 and 409, that added together give a triangular number (67896 = T₃₆₈).

The spelling of 67487409 in words is "sixty-seven million, four hundred eighty-seven thousand, four hundred nine".