67988139 has 8 divisors (see below), whose sum is σ = 90741312. Its totient is φ = 45280200.

The previous prime is 67988131. The next prime is 67988147. The reversal of 67988139 is 93188976.

It is an interprime number because it is at equal distance from previous prime (67988131) and next prime (67988147).

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

It is not a de Polignac number, because 67988139 - 2³ = 67988131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 67988091 and 67988100.

It is not an unprimeable number, because it can be changed into a prime (67988131) 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 7 ways as a sum of consecutive naturals, for example, 7629 + ... + 13934.

It is an arithmetic number, because the mean of its divisors is an integer number (11342664).

Almost surely, 2^67988139 is an apocalyptic number.

67988139 is a deficient number, since it is larger than the sum of its proper divisors (22753173).

67988139 is a wasteful number, since it uses less digits than its factorization.

67988139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22617.

The product of its digits is 653184, while the sum is 51.

The square root of 67988139 is about 8245.4920411095. The cubic root of 67988139 is about 408.1417771887.

The spelling of 67988139 in words is "sixty-seven million, nine hundred eighty-eight thousand, one hundred thirty-nine".