67609687 has 2 divisors, whose sum is σ = 67609688. Its totient is φ = 67609686.

The previous prime is 67609669. The next prime is 67609741. The reversal of 67609687 is 78690676.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 67609687 - 2¹⁵ = 67576919 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 67609687.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67609387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33804843 + 33804844.

It is an arithmetic number, because the mean of its divisors is an integer number (33804844).

Almost surely, 2^67609687 is an apocalyptic number.

67609687 is a deficient number, since it is larger than the sum of its proper divisors (1).

67609687 is an equidigital number, since it uses as much as digits as its factorization.

67609687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 762048, while the sum is 49.

The square root of 67609687 is about 8222.5109911754. The cubic root of 67609687 is about 407.3830685614.

The spelling of 67609687 in words is "sixty-seven million, six hundred nine thousand, six hundred eighty-seven".