67449289 has 2 divisors, whose sum is σ = 67449290. Its totient is φ = 67449288.

The previous prime is 67449287. The next prime is 67449323. The reversal of 67449289 is 98294476.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60715264 + 6734025 = 7792^2 + 2595^2 .

It is a cyclic number.

It is not a de Polignac number, because 67449289 - 2¹ = 67449287 is a prime.

Together with 67449287, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (67449281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33724644 + 33724645.

It is an arithmetic number, because the mean of its divisors is an integer number (33724645).

Almost surely, 2^67449289 is an apocalyptic number.

It is an amenable number.

67449289 is a deficient number, since it is larger than the sum of its proper divisors (1).

67449289 is an equidigital number, since it uses as much as digits as its factorization.

67449289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 49.

The square root of 67449289 is about 8212.7516095399. The cubic root of 67449289 is about 407.0606533653.

The spelling of 67449289 in words is "sixty-seven million, four hundred forty-nine thousand, two hundred eighty-nine".