2102681929 has 2 divisors, whose sum is σ = 2102681930. Its totient is φ = 2102681928.

The previous prime is 2102681923. The next prime is 2102681953. The reversal of 2102681929 is 9291862012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1949045904 + 153636025 = 44148^2 + 12395^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102681929 - 2³ = 2102681921 is a prime.

It is a super-2 number, since 2×2102681929² = 8842542589086322082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2102681891 and 2102681900.

It is not a weakly prime, because it can be changed into another prime (2102681921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051340964 + 1051340965.

It is an arithmetic number, because the mean of its divisors is an integer number (1051340965).

Almost surely, 2^2102681929 is an apocalyptic number.

It is an amenable number.

2102681929 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102681929 is an equidigital number, since it uses as much as digits as its factorization.

2102681929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 2102681929 is about 45855.0098571574. The cubic root of 2102681929 is about 1281.1240794941.

The spelling of 2102681929 in words is "two billion, one hundred two million, six hundred eighty-one thousand, nine hundred twenty-nine".