2101959077 has 2 divisors, whose sum is σ = 2101959078. Its totient is φ = 2101959076.

The previous prime is 2101959073. The next prime is 2101959091. The reversal of 2101959077 is 7709591012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1747992481 + 353966596 = 41809^2 + 18814^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101959077 - 2² = 2101959073 is a prime.

It is a super-2 number, since 2×2101959077² = 8836463922765383858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2101959073) 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, 1050979538 + 1050979539.

It is an arithmetic number, because the mean of its divisors is an integer number (1050979539).

Almost surely, 2^2101959077 is an apocalyptic number.

It is an amenable number.

2101959077 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101959077 is an equidigital number, since it uses as much as digits as its factorization.

2101959077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39690, while the sum is 41.

The square root of 2101959077 is about 45847.1272491527. The cubic root of 2101959077 is about 1280.9772560128.

The spelling of 2101959077 in words is "two billion, one hundred one million, nine hundred fifty-nine thousand, seventy-seven".