67749289 has 2 divisors, whose sum is σ = 67749290. Its totient is φ = 67749288.

The previous prime is 67749271. The next prime is 67749299. The reversal of 67749289 is 98294776.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45968400 + 21780889 = 6780^2 + 4667^2 .

It is a cyclic number.

It is not a de Polignac number, because 67749289 - 2¹³ = 67741097 is a prime.

It is not a weakly prime, because it can be changed into another prime (67749239) 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, 33874644 + 33874645.

It is an arithmetic number, because the mean of its divisors is an integer number (33874645).

Almost surely, 2^67749289 is an apocalyptic number.

It is an amenable number.

67749289 is a deficient number, since it is larger than the sum of its proper divisors (1).

67749289 is an equidigital number, since it uses as much as digits as its factorization.

67749289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 52.

The square root of 67749289 is about 8230.9956262897. The cubic root of 67749289 is about 407.6632670326.

The spelling of 67749289 in words is "sixty-seven million, seven hundred forty-nine thousand, two hundred eighty-nine".