61317289 has 8 divisors (see below), whose sum is σ = 67582368. Its totient is φ = 55167360.

The previous prime is 61317257. The next prime is 61317293. The reversal of 61317289 is 98271316.

61317289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61317289 - 2⁵ = 61317257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61317889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27667 + ... + 29800.

It is an arithmetic number, because the mean of its divisors is an integer number (8447796).

Almost surely, 2^61317289 is an apocalyptic number.

It is an amenable number.

61317289 is a deficient number, since it is larger than the sum of its proper divisors (6265079).

61317289 is a wasteful number, since it uses less digits than its factorization.

61317289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57575.

The product of its digits is 18144, while the sum is 37.

The square root of 61317289 is about 7830.5356777171. The cubic root of 61317289 is about 394.3310559810.

The spelling of 61317289 in words is "sixty-one million, three hundred seventeen thousand, two hundred eighty-nine".