67782289 has 3 divisors (see below), whose sum is σ = 67790523. Its totient is φ = 67774056.

The previous prime is 67782277. The next prime is 67782293. The reversal of 67782289 is 98228776.

The square root of 67782289 is 8233.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 13140625 + 54641664 = 3625^2 + 7392^2 .

It is not a de Polignac number, because 67782289 - 2⁷ = 67782161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67782229) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4117 + ... + 12349.

It is an arithmetic number, because the mean of its divisors is an integer number (22596841).

Almost surely, 2^67782289 is an apocalyptic number.

67782289 is the 8233-rd square number.

67782289 is the 4117-th centered octagonal number.

It is an amenable number.

67782289 is a deficient number, since it is larger than the sum of its proper divisors (8234).

67782289 is an frugal number, since it uses more digits than its factorization.

67782289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16466 (or 8233 counting only the distinct ones).

The product of its digits is 677376, while the sum is 49.

The cubic root of 67782289 is about 407.7294458533.

Multiplying 67782289 by its sum of digits (49), we get a square (3321332161 = 57631²).

The spelling of 67782289 in words is "sixty-seven million, seven hundred eighty-two thousand, two hundred eighty-nine".