67891339 has 2 divisors, whose sum is σ = 67891340. Its totient is φ = 67891338.

The previous prime is 67891303. The next prime is 67891363. The reversal of 67891339 is 93319876.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67891339 - 2¹⁷ = 67760267 is a prime.

It is a super-2 number, since 2×67891339² = 9218467822425842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (67891379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33945669 + 33945670.

It is an arithmetic number, because the mean of its divisors is an integer number (33945670).

Almost surely, 2^67891339 is an apocalyptic number.

67891339 is a deficient number, since it is larger than the sum of its proper divisors (1).

67891339 is an equidigital number, since it uses as much as digits as its factorization.

67891339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 46.

The square root of 67891339 is about 8239.6200761928. The cubic root of 67891339 is about 407.9479841255.

It can be divided in two parts, 6789 and 1339, that added together give a triangular number (8128 = T₁₂₇).

The spelling of 67891339 in words is "sixty-seven million, eight hundred ninety-one thousand, three hundred thirty-nine".