67039989 has 8 divisors (see below), whose sum is σ = 90901920. Its totient is φ = 43935696.

The previous prime is 67039981. The next prime is 67039997. The reversal of 67039989 is 98993076.

It is an interprime number because it is at equal distance from previous prime (67039981) and next prime (67039997).

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

It is not a de Polignac number, because 67039989 - 2³ = 67039981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67039981) 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, 189202 + ... + 189555.

It is an arithmetic number, because the mean of its divisors is an integer number (11362740).

Almost surely, 2^67039989 is an apocalyptic number.

It is an amenable number.

67039989 is a deficient number, since it is larger than the sum of its proper divisors (23861931).

67039989 is a wasteful number, since it uses less digits than its factorization.

67039989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378819.

The product of its (nonzero) digits is 734832, while the sum is 51.

The square root of 67039989 is about 8187.7951244520. The cubic root of 67039989 is about 406.2355985743.

The spelling of 67039989 in words is "sixty-seven million, thirty-nine thousand, nine hundred eighty-nine".