61789281 has 8 divisors (see below), whose sum is σ = 82489344. Its totient is φ = 41141040.

The previous prime is 61789243. The next prime is 61789289. The reversal of 61789281 is 18298716.

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

It is not a de Polignac number, because 61789281 - 2⁷ = 61789153 is a prime.

It is a super-2 number, since 2×61789281² = 7635830492993922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61789289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10081 + ... + 15006.

It is an arithmetic number, because the mean of its divisors is an integer number (10311168).

Almost surely, 2^61789281 is an apocalyptic number.

It is an amenable number.

61789281 is a deficient number, since it is larger than the sum of its proper divisors (20700063).

61789281 is a wasteful number, since it uses less digits than its factorization.

61789281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25911.

The product of its digits is 48384, while the sum is 42.

The square root of 61789281 is about 7860.6158155707. The cubic root of 61789281 is about 395.3402633388.

It can be divided in two parts, 617 and 89281, that added together give a palindrome (89898).

The spelling of 61789281 in words is "sixty-one million, seven hundred eighty-nine thousand, two hundred eighty-one".