67398869 has 2 divisors, whose sum is σ = 67398870. Its totient is φ = 67398868.

The previous prime is 67398857. The next prime is 67398887. The reversal of 67398869 is 96889376.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66210769 + 1188100 = 8137^2 + 1090^2 .

It is a cyclic number.

It is not a de Polignac number, because 67398869 - 2⁴ = 67398853 is a prime.

It is a super-2 number, since 2×67398869² = 9085215084958322, which contains 22 as substring.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33699434 + 33699435.

It is an arithmetic number, because the mean of its divisors is an integer number (33699435).

Almost surely, 2^67398869 is an apocalyptic number.

It is an amenable number.

67398869 is a deficient number, since it is larger than the sum of its proper divisors (1).

67398869 is an equidigital number, since it uses as much as digits as its factorization.

67398869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3919104, while the sum is 56.

The square root of 67398869 is about 8209.6814189102. The cubic root of 67398869 is about 406.9591988027.

The spelling of 67398869 in words is "sixty-seven million, three hundred ninety-eight thousand, eight hundred sixty-nine".