67689901 has 2 divisors, whose sum is σ = 67689902. Its totient is φ = 67689900.

The previous prime is 67689889. The next prime is 67689949. The reversal of 67689901 is 10998676.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48636676 + 19053225 = 6974^2 + 4365^2 .

It is a cyclic number.

It is not a de Polignac number, because 67689901 - 2⁹ = 67689389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67689991) 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 as a sum of consecutive naturals, namely, 33844950 + 33844951.

It is an arithmetic number, because the mean of its divisors is an integer number (33844951).

Almost surely, 2^67689901 is an apocalyptic number.

It is an amenable number.

67689901 is a deficient number, since it is larger than the sum of its proper divisors (1).

67689901 is an equidigital number, since it uses as much as digits as its factorization.

67689901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 67689901 is about 8227.3872523420. The cubic root of 67689901 is about 407.5441150629.

The spelling of 67689901 in words is "sixty-seven million, six hundred eighty-nine thousand, nine hundred one".