67989937 has 8 divisors (see below), whose sum is σ = 70225704. Its totient is φ = 65789568.

The previous prime is 67989907. The next prime is 67989959. The reversal of 67989937 is 73998976.

It can be written as a sum of positive squares in 4 ways, for example, as 24443136 + 43546801 = 4944^2 + 6599^2 .

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 67989937 - 2¹¹ = 67987889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67989907) 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, 4918 + ... + 12655.

It is an arithmetic number, because the mean of its divisors is an integer number (8778213).

Almost surely, 2^67989937 is an apocalyptic number.

It is an amenable number.

67989937 is a deficient number, since it is larger than the sum of its proper divisors (2235767).

67989937 is a wasteful number, since it uses less digits than its factorization.

67989937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17699.

The product of its digits is 5143824, while the sum is 58.

The square root of 67989937 is about 8245.6010696613. The cubic root of 67989937 is about 408.1453750341.

The spelling of 67989937 in words is "sixty-seven million, nine hundred eighty-nine thousand, nine hundred thirty-seven".