2194391677 has 2 divisors, whose sum is σ = 2194391678. Its totient is φ = 2194391676.

The previous prime is 2194391653. The next prime is 2194391707. The reversal of 2194391677 is 7761934912.

2194391677 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2189678436 + 4713241 = 46794^2 + 2171^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2194391677 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2194391677.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2194391477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1097195838 + 1097195839.

It is an arithmetic number, because the mean of its divisors is an integer number (1097195839).

Almost surely, 2^2194391677 is an apocalyptic number.

It is an amenable number.

2194391677 is a deficient number, since it is larger than the sum of its proper divisors (1).

2194391677 is an equidigital number, since it uses as much as digits as its factorization.

2194391677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 571536, while the sum is 49.

The square root of 2194391677 is about 46844.3345240382. The cubic root of 2194391677 is about 1299.4853341421.

The spelling of 2194391677 in words is "two billion, one hundred ninety-four million, three hundred ninety-one thousand, six hundred seventy-seven".