61998843 has 16 divisors (see below), whose sum is σ = 87562880. Its totient is φ = 38911104.

The previous prime is 61998841. The next prime is 61998857. The reversal of 61998843 is 34889916.

It is not a de Polignac number, because 61998843 - 2¹ = 61998841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61998792 and 61998801.

It is not an unprimeable number, because it can be changed into a prime (61998841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5955 + ... + 12627.

It is an arithmetic number, because the mean of its divisors is an integer number (5472680).

Almost surely, 2^61998843 is an apocalyptic number.

61998843 is a deficient number, since it is larger than the sum of its proper divisors (25564037).

61998843 is a wasteful number, since it uses less digits than its factorization.

61998843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6858.

The product of its digits is 373248, while the sum is 48.

The square root of 61998843 is about 7873.9344040956. The cubic root of 61998843 is about 395.7866989739.

The spelling of 61998843 in words is "sixty-one million, nine hundred ninety-eight thousand, eight hundred forty-three".