2784400061 has 2 divisors, whose sum is σ = 2784400062. Its totient is φ = 2784400060.

The previous prime is 2784400043. The next prime is 2784400093. The reversal of 2784400061 is 1600044872.

It is an a-pointer prime, because the next prime (2784400093) can be obtained adding 2784400061 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2013227161 + 771172900 = 44869^2 + 27770^2 .

It is a cyclic number.

It is not a de Polignac number, because 2784400061 - 2³⁰ = 1710658237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2784400001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1392200030 + 1392200031.

It is an arithmetic number, because the mean of its divisors is an integer number (1392200031).

Almost surely, 2^2784400061 is an apocalyptic number.

It is an amenable number.

2784400061 is a deficient number, since it is larger than the sum of its proper divisors (1).

2784400061 is an equidigital number, since it uses as much as digits as its factorization.

2784400061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 2784400061 is about 52767.4147651749. The cubic root of 2784400061 is about 1406.8373122855.

The spelling of 2784400061 in words is "two billion, seven hundred eighty-four million, four hundred thousand, sixty-one".