2189941877 has 2 divisors, whose sum is σ = 2189941878. Its totient is φ = 2189941876.

The previous prime is 2189941823. The next prime is 2189941891. The reversal of 2189941877 is 7781499812.

2189941877 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2094801361 + 95140516 = 45769^2 + 9754^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2189941877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2189941807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1094970938 + 1094970939.

It is an arithmetic number, because the mean of its divisors is an integer number (1094970939).

Almost surely, 2^2189941877 is an apocalyptic number.

It is an amenable number.

2189941877 is a deficient number, since it is larger than the sum of its proper divisors (1).

2189941877 is an equidigital number, since it uses as much as digits as its factorization.

2189941877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 56.

The square root of 2189941877 is about 46796.8148168227. The cubic root of 2189941877 is about 1298.6063718202.

The spelling of 2189941877 in words is "two billion, one hundred eighty-nine million, nine hundred forty-one thousand, eight hundred seventy-seven".