2219948777 has 2 divisors, whose sum is σ = 2219948778. Its totient is φ = 2219948776.

The previous prime is 2219948767. The next prime is 2219948807. The reversal of 2219948777 is 7778499122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2203269721 + 16679056 = 46939^2 + 4084^2 .

It is a cyclic number.

It is not a de Polignac number, because 2219948777 - 2⁶ = 2219948713 is a prime.

It is not a weakly prime, because it can be changed into another prime (2219948737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1109974388 + 1109974389.

It is an arithmetic number, because the mean of its divisors is an integer number (1109974389).

Almost surely, 2^2219948777 is an apocalyptic number.

It is an amenable number.

2219948777 is a deficient number, since it is larger than the sum of its proper divisors (1).

2219948777 is an equidigital number, since it uses as much as digits as its factorization.

2219948777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3556224, while the sum is 56.

The square root of 2219948777 is about 47116.3323806087. The cubic root of 2219948777 is about 1304.5107166901.

The spelling of 2219948777 in words is "two billion, two hundred nineteen million, nine hundred forty-eight thousand, seven hundred seventy-seven".