67959691 has 2 divisors, whose sum is σ = 67959692. Its totient is φ = 67959690.

The previous prime is 67959667. The next prime is 67959707. The reversal of 67959691 is 19695976.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67959691 - 2¹⁵ = 67926923 is a prime.

It is not a weakly prime, because it can be changed into another prime (67959611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33979845 + 33979846.

It is an arithmetic number, because the mean of its divisors is an integer number (33979846).

Almost surely, 2^67959691 is an apocalyptic number.

67959691 is a deficient number, since it is larger than the sum of its proper divisors (1).

67959691 is an equidigital number, since it uses as much as digits as its factorization.

67959691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 918540, while the sum is 52.

The square root of 67959691 is about 8243.7667967987. The cubic root of 67959691 is about 408.0848435468.

The spelling of 67959691 in words is "sixty-seven million, nine hundred fifty-nine thousand, six hundred ninety-one".