61326289 has 4 divisors (see below), whose sum is σ = 62331700. Its totient is φ = 60320880.

The previous prime is 61326253. The next prime is 61326313. The reversal of 61326289 is 98262316.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1000000 + 60326289 = 1000^2 + 7767^2 .

It is a cyclic number.

It is not a de Polignac number, because 61326289 - 2¹⁵ = 61293521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61326229) 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, 502614 + ... + 502735.

It is an arithmetic number, because the mean of its divisors is an integer number (15582925).

Almost surely, 2^61326289 is an apocalyptic number.

It is an amenable number.

61326289 is a deficient number, since it is larger than the sum of its proper divisors (1005411).

61326289 is a wasteful number, since it uses less digits than its factorization.

61326289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005410.

The product of its digits is 31104, while the sum is 37.

The square root of 61326289 is about 7831.1103299596. The cubic root of 61326289 is about 394.3503480162.

It can be divided in two parts, 6132 and 6289, that added together give a palindrome (12421).

The spelling of 61326289 in words is "sixty-one million, three hundred twenty-six thousand, two hundred eighty-nine".