61284863 has 4 divisors (see below), whose sum is σ = 61305720. Its totient is φ = 61264008.

The previous prime is 61284829. The next prime is 61284889. The reversal of 61284863 is 36848216.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 61284863 - 2⁸ = 61284607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61284263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5120 + ... + 12197.

It is an arithmetic number, because the mean of its divisors is an integer number (15326430).

Almost surely, 2^61284863 is an apocalyptic number.

61284863 is a deficient number, since it is larger than the sum of its proper divisors (20857).

61284863 is a wasteful number, since it uses less digits than its factorization.

61284863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20856.

The product of its digits is 55296, while the sum is 38.

The square root of 61284863 is about 7828.4649197656. The cubic root of 61284863 is about 394.2615332649.

The spelling of 61284863 in words is "sixty-one million, two hundred eighty-four thousand, eight hundred sixty-three".