2056129949 has 2 divisors, whose sum is σ = 2056129950. Its totient is φ = 2056129948.

The previous prime is 2056129913. The next prime is 2056129961. The reversal of 2056129949 is 9499216502.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1729062724 + 327067225 = 41582^2 + 18085^2 .

It is a cyclic number.

It is not a de Polignac number, because 2056129949 - 2⁸ = 2056129693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2056129979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1028064974 + 1028064975.

It is an arithmetic number, because the mean of its divisors is an integer number (1028064975).

Almost surely, 2^2056129949 is an apocalyptic number.

It is an amenable number.

2056129949 is a deficient number, since it is larger than the sum of its proper divisors (1).

2056129949 is an equidigital number, since it uses as much as digits as its factorization.

2056129949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 47.

The square root of 2056129949 is about 45344.5691235455. The cubic root of 2056129949 is about 1271.5990251912.

The spelling of 2056129949 in words is "two billion, fifty-six million, one hundred twenty-nine thousand, nine hundred forty-nine".