61288289 has 4 divisors (see below), whose sum is σ = 61303956. Its totient is φ = 61272624.

The previous prime is 61288277. The next prime is 61288301. The reversal of 61288289 is 98288216.

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 is an interprime number because it is at equal distance from previous prime (61288277) and next prime (61288301).

It can be written as a sum of positive squares in 2 ways, for example, as 49843600 + 11444689 = 7060^2 + 3383^2 .

It is a cyclic number.

It is not a de Polignac number, because 61288289 - 2⁴ = 61288273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61288259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3527 + ... + 11619.

It is an arithmetic number, because the mean of its divisors is an integer number (15325989).

Almost surely, 2^61288289 is an apocalyptic number.

It is an amenable number.

61288289 is a deficient number, since it is larger than the sum of its proper divisors (15667).

61288289 is an equidigital number, since it uses as much as digits as its factorization.

61288289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15666.

The product of its digits is 110592, while the sum is 44.

The square root of 61288289 is about 7828.6837335532. The cubic root of 61288289 is about 394.2688799123.

The spelling of 61288289 in words is "sixty-one million, two hundred eighty-eight thousand, two hundred eighty-nine".