2105306249 has 2 divisors, whose sum is σ = 2105306250. Its totient is φ = 2105306248.

The previous prime is 2105306183. The next prime is 2105306257. The reversal of 2105306249 is 9426035012.

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., 1403851024 + 701455225 = 37468^2 + 26485^2 .

It is a cyclic number.

It is not a de Polignac number, because 2105306249 - 2²⁸ = 1836870793 is a prime.

It is not a weakly prime, because it can be changed into another prime (2105306149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052653124 + 1052653125.

It is an arithmetic number, because the mean of its divisors is an integer number (1052653125).

Almost surely, 2^2105306249 is an apocalyptic number.

It is an amenable number.

2105306249 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105306249 is an equidigital number, since it uses as much as digits as its factorization.

2105306249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 2105306249 is about 45883.6163461426. The cubic root of 2105306249 is about 1281.6568406550.

The spelling of 2105306249 in words is "two billion, one hundred five million, three hundred six thousand, two hundred forty-nine".