2029977721 has 2 divisors, whose sum is σ = 2029977722. Its totient is φ = 2029977720.

The previous prime is 2029977673. The next prime is 2029977739. The reversal of 2029977721 is 1277799202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1490809321 + 539168400 = 38611^2 + 23220^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2029977721 is a prime.

It is not a weakly prime, because it can be changed into another prime (2029977121) 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, 1014988860 + 1014988861.

It is an arithmetic number, because the mean of its divisors is an integer number (1014988861).

Almost surely, 2^2029977721 is an apocalyptic number.

It is an amenable number.

2029977721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2029977721 is an equidigital number, since it uses as much as digits as its factorization.

2029977721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 222264, while the sum is 46.

The square root of 2029977721 is about 45055.2740641981. The cubic root of 2029977721 is about 1266.1847848974.

The spelling of 2029977721 in words is "two billion, twenty-nine million, nine hundred seventy-seven thousand, seven hundred twenty-one".