67911689 has 2 divisors, whose sum is σ = 67911690. Its totient is φ = 67911688.

The previous prime is 67911677. The next prime is 67911721. The reversal of 67911689 is 98611976.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64963600 + 2948089 = 8060^2 + 1717^2 .

It is a cyclic number.

It is not a de Polignac number, because 67911689 - 2⁴ = 67911673 is a prime.

It is a super-2 number, since 2×67911689² = 9223995005665442, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (67911619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33955844 + 33955845.

It is an arithmetic number, because the mean of its divisors is an integer number (33955845).

Almost surely, 2^67911689 is an apocalyptic number.

It is an amenable number.

67911689 is a deficient number, since it is larger than the sum of its proper divisors (1).

67911689 is an equidigital number, since it uses as much as digits as its factorization.

67911689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 47.

The square root of 67911689 is about 8240.8548707036. The cubic root of 67911689 is about 407.9887399975.

The spelling of 67911689 in words is "sixty-seven million, nine hundred eleven thousand, six hundred eighty-nine".