67889531 has 2 divisors, whose sum is σ = 67889532. Its totient is φ = 67889530.

The previous prime is 67889513. The next prime is 67889533. The reversal of 67889531 is 13598876.

It is a happy number.

Together with previous prime (67889513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67889531 - 2²⁶ = 780667 is a prime.

It is a super-2 number, since 2×67889531² = 9217976838799922, which contains 22 as substring.

Together with 67889533, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (67889533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33944765 + 33944766.

It is an arithmetic number, because the mean of its divisors is an integer number (33944766).

Almost surely, 2^67889531 is an apocalyptic number.

67889531 is a deficient number, since it is larger than the sum of its proper divisors (1).

67889531 is an equidigital number, since it uses as much as digits as its factorization.

67889531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 47.

The square root of 67889531 is about 8239.5103616659. The cubic root of 67889531 is about 407.9443627677.

It can be divided in two parts, 678 and 89531, that added together give a palindrome (90209).

The spelling of 67889531 in words is "sixty-seven million, eight hundred eighty-nine thousand, five hundred thirty-one".