67107989 has 8 divisors (see below), whose sum is σ = 72437400. Its totient is φ = 61802496.

The previous prime is 67107983. The next prime is 67108003. The reversal of 67107989 is 98970176.

It can be written as a sum of positive squares in 4 ways, for example, as 6002500 + 61105489 = 2450^2 + 7817^2 .

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 67107989 - 2¹² = 67103893 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 (67107983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89 + ... + 11585.

It is an arithmetic number, because the mean of its divisors is an integer number (9054675).

Almost surely, 2^67107989 is an apocalyptic number.

It is an amenable number.

67107989 is a deficient number, since it is larger than the sum of its proper divisors (5329411).

67107989 is a wasteful number, since it uses less digits than its factorization.

67107989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11959.

The product of its (nonzero) digits is 190512, while the sum is 47.

The square root of 67107989 is about 8191.9465940642. The cubic root of 67107989 is about 406.3729031220.

The spelling of 67107989 in words is "sixty-seven million, one hundred seven thousand, nine hundred eighty-nine".