67321487 has 4 divisors (see below), whose sum is σ = 67431216. Its totient is φ = 67211760.

The previous prime is 67321459. The next prime is 67321543. The reversal of 67321487 is 78412376.

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

It is a cyclic number.

It is not a de Polignac number, because 67321487 - 2¹² = 67317391 is a prime.

It is a super-2 number, since 2×67321487² = 9064365223782338, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 67321487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67321417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53939 + ... + 55172.

It is an arithmetic number, because the mean of its divisors is an integer number (16857804).

Almost surely, 2^67321487 is an apocalyptic number.

67321487 is a deficient number, since it is larger than the sum of its proper divisors (109729).

67321487 is a wasteful number, since it uses less digits than its factorization.

67321487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109728.

The product of its digits is 56448, while the sum is 38.

The square root of 67321487 is about 8204.9672150472. The cubic root of 67321487 is about 406.8033931400.

The spelling of 67321487 in words is "sixty-seven million, three hundred twenty-one thousand, four hundred eighty-seven".