67654861 has 2 divisors, whose sum is σ = 67654862. Its totient is φ = 67654860.

The previous prime is 67654859. The next prime is 67654897. The reversal of 67654861 is 16845676.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39501225 + 28153636 = 6285^2 + 5306^2 .

It is a cyclic number.

It is not a de Polignac number, because 67654861 - 2¹ = 67654859 is a prime.

Together with 67654859, it forms a pair of twin primes.

It is equal to p_3988159 and since 67654861 and 3988159 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67654831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33827430 + 33827431.

It is an arithmetic number, because the mean of its divisors is an integer number (33827431).

Almost surely, 2^67654861 is an apocalyptic number.

It is an amenable number.

67654861 is a deficient number, since it is larger than the sum of its proper divisors (1).

67654861 is an equidigital number, since it uses as much as digits as its factorization.

67654861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 43.

The square root of 67654861 is about 8225.2575035679. The cubic root of 67654861 is about 407.4737805404.

The spelling of 67654861 in words is "sixty-seven million, six hundred fifty-four thousand, eight hundred sixty-one".