67917985 has 8 divisors (see below), whose sum is σ = 81685800. Its totient is φ = 54211584.

The previous prime is 67917943. The next prime is 67917991. The reversal of 67917985 is 58971976.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 25979409 + 41938576 = 5097^2 + 6476^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 67917985 - 2¹⁷ = 67786913 is a prime.

It is a super-2 number, since 2×67917985² = 9225705372920450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12882 + ... + 17371.

It is an arithmetic number, because the mean of its divisors is an integer number (10210725).

Almost surely, 2^67917985 is an apocalyptic number.

It is an amenable number.

67917985 is a deficient number, since it is larger than the sum of its proper divisors (13767815).

67917985 is a wasteful number, since it uses less digits than its factorization.

67917985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30707.

The product of its digits is 952560, while the sum is 52.

The square root of 67917985 is about 8241.2368610543. The cubic root of 67917985 is about 408.0013476343.

The spelling of 67917985 in words is "sixty-seven million, nine hundred seventeen thousand, nine hundred eighty-five".