2109946477 has 2 divisors, whose sum is σ = 2109946478. Its totient is φ = 2109946476.

The previous prime is 2109946429. The next prime is 2109946511. The reversal of 2109946477 is 7746499012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1834751556 + 275194921 = 42834^2 + 16589^2 .

It is a cyclic number.

It is not a de Polignac number, because 2109946477 - 2¹¹ = 2109944429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2109946477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2109946577) 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, 1054973238 + 1054973239.

It is an arithmetic number, because the mean of its divisors is an integer number (1054973239).

Almost surely, 2^2109946477 is an apocalyptic number.

It is an amenable number.

2109946477 is a deficient number, since it is larger than the sum of its proper divisors (1).

2109946477 is an equidigital number, since it uses as much as digits as its factorization.

2109946477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 49.

The square root of 2109946477 is about 45934.1537094132. The cubic root of 2109946477 is about 1282.5977672594.

It can be divided in two parts, 21099 and 46477, that added together give a palindrome (67576).

The spelling of 2109946477 in words is "two billion, one hundred nine million, nine hundred forty-six thousand, four hundred seventy-seven".