67642369 has 2 divisors, whose sum is σ = 67642370. Its totient is φ = 67642368.

The previous prime is 67642349. The next prime is 67642381. The reversal of 67642369 is 96324676.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39690000 + 27952369 = 6300^2 + 5287^2 .

It is a cyclic number.

It is not a de Polignac number, because 67642369 - 2⁹ = 67641857 is a prime.

It is a super-2 number, since 2×67642369² = 9150980167864322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (67642319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33821184 + 33821185.

It is an arithmetic number, because the mean of its divisors is an integer number (33821185).

Almost surely, 2^67642369 is an apocalyptic number.

It is an amenable number.

67642369 is a deficient number, since it is larger than the sum of its proper divisors (1).

67642369 is an equidigital number, since it uses as much as digits as its factorization.

67642369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 43.

The square root of 67642369 is about 8224.4981001882. The cubic root of 67642369 is about 407.4486999293.

The spelling of 67642369 in words is "sixty-seven million, six hundred forty-two thousand, three hundred sixty-nine".