67398887 has 2 divisors, whose sum is σ = 67398888. Its totient is φ = 67398886.

The previous prime is 67398869. The next prime is 67398889. The reversal of 67398887 is 78889376.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67398887 - 2⁸ = 67398631 is a prime.

Together with 67398889, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67398889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33699443 + 33699444.

It is an arithmetic number, because the mean of its divisors is an integer number (33699444).

Almost surely, 2^67398887 is an apocalyptic number.

67398887 is a deficient number, since it is larger than the sum of its proper divisors (1).

67398887 is an equidigital number, since it uses as much as digits as its factorization.

67398887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4064256, while the sum is 56.

The square root of 67398887 is about 8209.6825151768. The cubic root of 67398887 is about 406.9592350312.

The spelling of 67398887 in words is "sixty-seven million, three hundred ninety-eight thousand, eight hundred eighty-seven".